THE SUNDAY OREGONIAN, PORTLAND, DECEMBER 31, 1923 Through countless decades the torrid zone has contributed something to the material welfare of the temperate zone. BY JOSEPH A. PETTIT, M. D. WHAT is to be done with the peo ple living in the year 2200T The population of Europe has during the past hundred years Increased about 200 per cent. To state It con cretely: whereas Its population a century ago stood at a little over 100,000,000, it has now mounted-to over 800,000,000. Applying the law of ratio (based upon an examination of the percentage of In crease during the past four centuries and the increased longevity of modern civili zation) we may calculate that the next hundred years will bring the population well up toward a billion. Then what? Will the people be able to sit down, or will they have to stand up? Will they go hungry, or will they be fed, or clothed, or provided with snelter? And if the percentage ratio continues for 200 years beyond that, how will the acres of Eu rope stand the strain of maintaining 2,000,000,000, or more? We will dismiss the hypothesis of emigration; for statistics reveal the fact that emigration has been influencing the population of Europe to a maximum de gree for the past 100 years, and that, in epite of an emigration of some 30,000, 000, its population has climbed. What then will retard this overwhelming ratio of increase? Will future wars do so? There eeems to be a common Impression that wars tend to shrink the population of countries to an enormous degree. Let ns consider the statistical reports of the recent war. During a, period of over four years, a majority of the population of Europe were opposed to one another in the most deadly conflict recorded in his tory. The machinery used tor the de- struction of human life during this period of strife surpassed in ingenuity and ef ficiency that of all preceding wars. The size of the armies actually engaged in conflict cannot be paralleled on the pages of history. Yet, notwithstanding the vastness of the armed forces pitted against one another, and the fiendish in genuity of their engines of war, there were not over 7,000,000 of men slain during the four years and three months that this conflict endured. Viewed with out reference to percentage ratio, this figure looms large and portentous; but viewed with reference to the total popu lation of the countries engaged, it shrinks li importance. To speak specifically, only 2 per cent of the population was killed, or what amounts to only of 1 per cent per annum. The birthrate, which existed during the war far exceeded the figures of loss. Has, then, Europe's population been actually lessened by the war? We are forced to admit that It has not. Neither does it seem to have been definitely retarded. The majority of the wounded 12,000,000 (comprising after all only 4 per cent of the population) have returned to some peaceful occupa tion. The prisoners of war about 2 per cent of the population either have re turned to their former occupations, or soon will, amply able to do their part in the fecundity of the European races. So that we conclude that while the ratio of population increase has been momentarily slowed down to soma Blight degree, there continues a prodigious numerical pro gression of the human race. It is of interest to consider also how the population of the United States has been affected through the loss of life dur ing the world war. The actual war losses amounted to about 1-18 of 1 per cent of the total population. Nor was this total seriously affected by the influenza epi demic, the worse scourge which has ever swept over the United States in many years. The death toll was less than of 1 per cent figures which may be of interest when compared with the black plague, which claimed one-third of Eng land's population during three successive waves In the 14th century. An examina tion of the population of the United States during the last half century re veals that it has climbed by leaps and bounds that It has, In fact, grown 120 per cent The last census of the United States shows that the population of this country has increased 21 per cent for the ten years ending in 1910; and that the increase for the past ten years was 15 per cent. And this is despite the fact that the big influx of emigration has been shut off during half of this period and that the influenza epidemic and the war have claimed their relatively (from a per centage standpoint) meager toll. Our population now stands at about 105,000, 000. If the same percentage of increase that has governed the population of this country during the past 50 years is main tained, and since the normal increase will beyond doubt be swelled by Imml- gration from over-crowded Europe, it is reasonable to assume that the United States will have by the year 1373 no less than 200,000,000 of inhabitants. The figures which are given in refer ence to the decrease of birth rate among the American people will not in reality affect the increase in population, because relatively few babies die now as com pared with 20 years ago. In other words, the American mother of a quarter of a century ago might bear five children, but on the average would not raise to man hood any more than the American mother now, who bears only three children and loses none through the diseases of in fancy. A recent press dispatch speaks of an Oregon woman dying at the age of 98. At this particular time she had five liv ing children, 25 living grandchildren, 42 living great grandchildren, and one great great grandchild. She and her husband may be accredited with having added 73 to this country's population. A careful check of other families might prove this to be no exceptional record. Wars and disease do not seem to have had even a decimating influence on the population of the civilized world. Nor does there appear to be a decline in the reproduction of the race. And so, when our great grandchildren sit by their fire sides as grandfathers themselves, it is not Improbable that they can boast of their country being 300,000,000 strong. The problem of maintaining this ever increasing population is one that will have to be met in the future, when the percentage has leaped to the saturation point. The probabilities are that there will be a wide margin of gain in the ratio of population Increase during the next 100 years or so. This potentiality for in crease is reasonably insured through the strides made in medical science during the past 50 years in the preservation and stimulation of human vitality. It Is of interest to note that in the 17th century the average of human life was 13 years, while in the latter part of the succeeding century this average was raised to 30 years. During the "first part of this cen tury It rose to 35, and we find statistics showing that the average of human life has at present attained the mark of 45 years. Typhoid epidemics are now his torical, a result of the two methods of prevention innoculation and avoidance of contaminated water. The former death toll of diphtheria amongst chll--dren no longer exists, because of the pre ventive quarantine or the curative in noculatlon. Many former lethal diseases of the abdomen and of the other parts of the body are now amenable to surgical cure. The excessive use of alcohol has always had a direct and an indirect in fluence upon the shortening of human life. The voluntary moderation of its use Is gradually creeping over the world, and compulsory abstinence is being forced on some countries. The gradual elimination of the deleterious effect of diseases, as well as of intemperance, will have a tendency to remove many of the causes which influence early tissue de generation. We may find the next gen eration able to avoid the untimely de velopment of the senile changes, and our old people more likely to enjoy health when they attain the time-honored period prescribed by holy writ. We may finally establish a new standard. These factors will undoubtedly add at least a few more years to the average longevity. A scien tific consideration of the situation leads to a reasonable assumption that during the next quarter of a century the average of human life will be increased to 55 years or better. And It might be well to emphasize the fact that these factors will have a potential influence upon the rela tive increase of the world's' population, both as to the increased duration of pro ductivity, as well as to the immediate enumeration. The unborn generations are going to live longer than have the past genera tions. The ideals of the civilized world and the desires of modern men, as well as of the forthcoming man, woman and child, will make wider demands on life. The primitive desire for a simple abode, a few acres, a cow and a horse, and home spun raiment, has now been transformed into the ambitious demands with which we are immediately familiar.- It is evi dent that greater per capita productivity is necessary. Modern machinery and factories cannot produce raw materials.' They merely transform them from one shape to another. The problem of the increase of the world's population pre sents not only the natural numerical In crease of demands, but also the quality of the demands. It is not so much a question of where the food is to.be given manufacture into more edible forms, or where the cotton is to be spun and woven into cloth, as it is a problem of where these foodstuffs and fundamentals for raiment are to be produced in adequate quantities. In response to a question as to what the people in a certain village did for a livelihood, a facetious reply was given that the inhabitants took in each other's washing for a living. So far as furnishing essentials for existence of hu man life is concerned, some manufacturing centers present an analogous situation. It is evident that an adequate amount of crude materials must come from some where. At the present time the wheat fields of western Canada and the United States sources of supply that did not exist 100 years ago furnish an enor mous amount of the world's bread stuffs. These regions have been opened and put to the plow to feed an evergrowing and ambitious population. And with that population still on the increase and. still demanding, other sections and regions of productiveness will have to be looked for to yield their full quota of the world's supply. So that now as we consider the future populations of the world, we feel that new fields of production must be found. And why not the tropics? Through countless decades, tne torrid zone has contributed something to the material welfare of the temperate zones hides, rubbers, coffee, drugs exclusive prod ucts which have gradually become an intimate and necessary part of the life of the temperate zones. The tropics, broadly considered, contain both a mini mum population and a potentiality for maximum productiveness of those sub stances essential for the food and raiment and material comfort of human beings. This productiveness exists potentially in -the superlative degree, and yet is ac tually developed in only a minimum de gree. And why? The answer is found in the very essential particular in which these two regions are divergent energy. Men of the energetic zones have had their ventures into the luxuriant tropical regions, but mainly for adventure, for temporary sojourn, for experiment, or for speculation. It has stood as a self evident truth that they would never be able to accomplish the fact of permanent existence in the enervating climate and nnhealthful environments that It took the native, who through the advantages of birth and inheritance and gradual ad justment had become immune to tropical diseases or enured to tropical hardships, to bear up under the debilitating climate and its attendant diseases. But medical knowledge has gone far to overcome these difficulties and to conquer these terrors. Malaria, the most prevalent dis- ease of hot climates, Is a curable disease by virtue of certain medicines, and it has become a preventable disease through the control of the mosquito pest. Typhoid fever, as has already been said, is pre ventable through both innoculatlon and sanitation, as is also cholera; while yel low fever, which is still difficult to cure, can be absolutely prevented by the con trol of the type of mosquito that has been proved to be the only carrier of the germ of this particular disease and the only means of its transmission to man. The failure of the French to succeed In constructing the Panama canal was not so much because of failure of finance or lack of inadequate machinery, as It was because of the fact that medical science 80 years ago had not solved the problem of tropical diseases. Men died by the hundreds of yellow fever, of malaria, and of cholera. It has been estimated that every tie laid in the construction of the Panama railroad represented a human life. During the American construction of the present Panama canal the writer spent some weeks in the canal zone. There was not a single case of yellow fever in any of the hospitafs. Malaria had been curbed to a minimum, and al most all the beds in the malarial wards were vacant. It was possible to sit all evening upon the veranda of the Hotel Tivoli in the American 'quarter of Pa nama without being bitten by a mosquito. General Gorgas, heading the medical corps, contributed more to the real "solu tion of the problem of construction of this canal than did General Goethals, heading the engineer corps. Besides disease, sheer physical dis comfort has rendered the tropics dis agreeable or Impossible for permanent residence for the energetic inhabitant of SCOTLAND YARD'S HEAD BRANDS CLEVER WOMAN SPY AS A MYTH Despite Historical Romances Growing Out of Every War, Famous Criminologist Says Feminine JJspionage Failed Germany in World Conflict. IMAGINE a war story without a wom an spy, imagine a tale of diplomacy, high or low, with a divine creature moving through it, capturing the hearts and souls of all the poor men and ex tracting from them any state or military secret her curiosity or her evil will brought her to unveli. The woman spy Is one of the most settled of beliefs and ' to suggest that they are not miraculously effective, that they might even be said to do more harm than good, to the side that employs them, would seem to be a heresy that few could be guilty of. Yet this very heresy, this denial, that women spies are valuable has just been made by the man who by his position is the one who ought to know best. He is Sir Basil Thomson, who as chief of Scot land Yard, head of the British secret service during the war, and one of the greatest criminologists in the world, has made a remarkable record In crime de tection. He has been called Sherlock Holmes in real life and it has been said that if it had not been for his efforts, German spies, by their very number and unlimited possession of funds, might have accomplished what the German armies failed to accomplish in the field. Sir Basil Thomson has just arrived in America and after a bit of looking around has made some very startling statements. One of them that came quite unexpectedly was his declaration that the German system of espionage was Inef f.cient. Accustomed as we have been to the dark tales of diabolical German in trigue this will come as a surprise to most Americans. But most astounding of all is Sir Thompson's declaration that in spite of the power of woman's charms and her uncanny intuition she Is far from tfficient In spy work. Sir Thomson concentrated his two heresies in one terse sentence. Speaking of German spies he said, "I knew only -two or three good ones; and the Germans made the mistake of using women who are useless for that work." It is certainly hard to believe It pos slble that such a statement could be made in all Seriousness. By the shears of Delilah, whose spy work deprived the Israelites of their greatest hero, by the charms of Cleopatra, who started by an attempt to spy upon the Roman generals and found it unnecessary since they were perfectly willing to be her faithful serv ants, by the dirk of Judith, who ended a way by slicing off the king's head, it would seem that the ladies deserve more credit. , So much has the effectiveness of the woman spy been practically an article of faith, that it has passed to a proverb. Almost everybody knows the meaning of the French prcverb, "Cherchez la fem rne," or look for the woman, in case there is a particularly baffling mystery. And novelists, movie producers, stage direc tors have all served to keep up this be- -lief. Yet if it is true, and Sir Basil Thorn con ought to know, It was surely not until the late world war that the par ticular wiles of women as spies were sat isfactorily guarded against, for history has many records to prove that in the past the woman spy proved herself re markable, resourceful and serviceable to her employer. Sir Basil bases his belief in the in feriority of women for this work on the fact that they are not analytically mind ed. . They may - be resourceful, in an emergency, through their remarkable in tuitive power, he admits, but he contends they cannot lay plans or co-operate in them, since these activities require great analytical power. Another and more unexpected reason, Sir Basil thinks, Is the fact that women are more susceptible te the tender pas sion. The use of women it has been ad mitted has always been primarily a sex one to rouse love in the bosom of Impres sionable young officers, but in this there is always danger, as women are more likely to yield to this lure than men. Male spies have frequently proceeded by the temperate zone. But mechanical de vices have done much to contribute to his comfort and to mitigate his distress in such environments. Cooling devices, ice machines, and so on, all have tended to ameliorate the hardships which have hitherto beset those of other zones who have braved the rigors of the heat and other enervating conditions. So with health insured, and with comfort in prospect, there seems to be left no real season why energetic peoples should not take advantage of the tropical soil and climate and its unbounded- productive ness. And is there not assurance for the future in the fact that the abundance of the products of the most fertile areas of the earth will for centuries feed the peo ples of other zones, when they become populated beyond the saturation point and cannot produce sustenance for their own inhabitants? No one who has not personalty come in contact with the tropics can adequately realize its potential productivity. The one crop a year proposition is unknown there. It Ib simply a matter of how many weeks or months it takes for a certain crop to mature, and the ground can then be turned over and replanted. The abun dance of crop yield per acre Is amazing. The variety of sustaining food stuffs which can be grown in the tropics Is un limited. The hope for an adequate production of food and raiment for future peoples seemingly rests upon the productiveness of the tropics, and upon the fact that the utilization of this productiveness will be made possible through the development of medical science, thus rendering it a safe and healthful place In which to live and produce human sustenance in a su perlative degree. forming an attachment to a woman in the place where they were conducting their activities. Women spies whose duties have been to make men weakly amorous, while successful, have just as often, and even more so, become the vic tims in their turn and have been ren dered useless to the people who employed them. Then again it is said that while a man may subordinate everything to his ratrlotism, this is not the case with women, whose highest loyalty has always been to love. 4 The ancient story of Ariadne well il lustrates this fact. Some interpreters have declared that when Theseus, who came with the seven youths and seven maidens from Athens to Crete to be sacri ficed to the Minotaur, King Minos in stead of trying to get political Informa tion from the young prince by torture, the usual method, decided to use guile and commissioned his daughter Ariadne to make love to him. But as It happened It worked the other way round. Ariadne fell deeply in love with Theseus and. be trayed her father, her country, and all the laws of virtuous womanhood for the Athenian prince. History offers another tale very like this one. When Cortez, the conqueror of Mexico came with his Spainards among the Indians a woman who many believe was sent as a spy entered the Spanish ranks and gained the love of the general himself. But It was of no service to the Indians, for Marina, as she was called,.be came passionately attached to the con queror and thereafter helped him So much that it has been declared that with out her assistance the conquest of this empire In the west would have been im possible. California Gold Strike Aid to Industry Here. Oregon Said to Have Taken Dnat In Exchange tor Produce. OREGON'S first business excitement came in August, 1848, when a lit tle schooner from San Francisco pulled Into the wharf at the village of Portland and began to load all the Ore gon products obtainable in exchange for a lot of Mexican produce. After a cleanup was made of all the available products the captain of the visiting craft announced the discovery of gold in California. Very soon gold dust and states money was rolling back into Oregon in exchange for more Oregon products and so wheat was soon elimin ated as the circulating legal tender me dium. It was not long before Oregon was digging as much gold out of the sale of its products as the miners were getting in California. Industries began to get a footing In the state and the demand for workers brought additional settlers to Oregon just as the gold digging opera tions brought into California. As one of the results of this develop ment the manufacture of gold coins was started at Oregon City a few months later. The Oregon City mint was the first on the Pacific coast and coined 158, 500 in gold money under the sanction of the United States government. The faith of the government in these early days of the possibility of industrial development In Oregon impressed citizens of the state and resulted in the establishment soon afterward of the nucleus of plants from which present day industry developed. Much Remains to Be Said. "Senator, would you be so kind as to tell me in two words just what is behind this Shantung controversy?" "I'm sorry, major, that I can't oblige you, but when I return to Washington I will be glad to send you a copy of a speech I delivered some weeks ago. It is only 20,000 words in length, but I be lieve,' in the short time allotted to me, that I ahem succeeded in showing that the matter calls for ahem extended debate."