Image provided by: University of Oregon Libraries; Eugene, OR
About The west shore. (Portland, Or.) 1875-1891 | View Entire Issue (Oct. 1, 1878)
October, 1878, 46 THE WEST SHORE. THK BI.I K PIWX KK.S OK OPYISC TRA CINGS, m '. This irtooM it now eitenilvcly used in the drawing roonia gl number of linna and com taamea, ami iivH not only much labor hut a (mat ileal of wcaruieas to the junior draftsmen to whoat hit it uaually falU to make copies or tm iniia of ilraaiiik'i I he rVii'ri'' av Uiat in the oroc of Maura. Willuun Sellers k Co , awl in ths drawing-room of the I'ennsylva 11a railroad at Albania, all trai nigs, when MN than one oojiy is required, are niailr hy thia method. It ik ilrai ril-il ai follow III a ahort l-ajN-r rwad hy Mr. I'. Itarnca before the Insti tola of Mining Kiigineera: The ptocaM ia bolievcl to he of French origin, ami hat been used for many yeari. . mI at tention aoenia to have ln-en directed to it re- ntly. and il ureal value to engineers apcara likely to In lully rri'ojfiiiml. The luaniiiulatioiia required are of the in pleat (naaihle kind, ami are entirely within the kill ami mil. 1. 1111. hi of any ollice liy who an In trusted to injiy a letter in all ordinary I beet- liartn tllara mav lie ultilnarij.il aoma- what lima I Provide Hal Uianl aa large aa the tracing hu h ii to be onpiod. X lay on Urn hoard two or three thickni-aacs of amimoii blanket, or ita equivalent, to give a slightly yialdiug lav king for the pa pi r 1 l-ay 00 the blanket the prepared mht lUi the sensitive mle uppermost. 4. Uy on line p- i the tracing, smoothing it out aa perfM-lly aa poaaihlc so aa to inatire a I- ii- t contact witli the paper. ft. lav on the tracing a plate of clear glaai, which should be heavy enough to preaa tho trac ing oloaw down up.u the paper, Ordinary plate glaaa of " Uin kiinaa ia quite lulhcient. tt. Kip, tbe whole to a clear (untight, by puahiog it out mi a ahelf In. m an ordinary win dow, or iu any other convenient way, for an to ten minute. II . claar akyhght only can 1 hail, the M.urc limit be continued lor thirty forty live niinuu a. and under a cloudy iky, silly Ui ninety mi mi lee may be needed. ' llenmiF Ibe pr. i,hI H-r ami drench it frl lr ,,,. , tw mmuu in dean water, and hang it up by comer b. .In Any g... banl paper may l employed ((r,,m even a leaf from a i.rew copy book up to HruUil liarj which will bear the noceaearv wetting. ruf the aeuailifuig aolulinn uke i citrate of iron ami am mono, and N lw. dean water ami re.1 prustiate of potaah and N 01 laah water; .luwolve theae aeratelv ami x hem. keeping the solution in a yellow glaaa IU., ...carefully protocWd from Uie light I he paper mav b vary conveniently coated !'! '."'"T " '"ur mrb"' 'I'ameUr. 'with one JW W ') gotle over once with the mmi ,UlU ,, w mAuUoa ami a mmiUm with the ., aiiueel very dry. Th. M .b.ul.l ihe fa Ll . g JLS . AT' 9 1 ,lr,w"' -", ''"' SB r,,.m ,h uh u""1 " " -i he dry th. ,,., , , , ,, nr , i?! 'M--re,o the lighl the .urf U,' l"- of the t 'IM-- a. audi ,Urkrr ,, U,, murixiv ..,:rc.t!:,trl,,t,u m ZSSZ P Hr.WWiMg even U, Ihe Uitur. or Urel. cj the tra.,g cloU, A wwkiaj g, mtu krtUkm iU gyP" im not re,,u,r. to I. S ft'l'' made ItHlica aa awrh coaa ru h. -.l i Ul dr.w.ng, M U iH an in ncil uiion iar in the usual way, and that all the inking can lie done uK)ii tracuiK cloth laid un the pencil-work. In this way the coat of the tracing (in the ordinary sense) can be wholly saved, and the single copy of the finished tracing can thus be made in the "blue way to the best possible advantage. It may safely lie said that this method of opying can lie employed if only one or two opiea tier wek are needed of ordinar ily com- TI1E HAIRY WOODPECKER. Tho engraving on this page shows a pair of "hairy woodpeekors" (Picas villoma) common on this coast and widely distributed throughout the whole country. The birds are lively, noisy and fearless of men. In the South it may be seen at all seasons in orchards, among the trees of cities, along the borders of plantations, ou TMK "AIIIV WOODm;KKR-(I.icu,vi0u,) " i', fields, .u,d in the d.nit Cimuth ? rC?. Und iD the m"h"' ' tton tri th0nMl"iM'pi. where a struggling to , or w,lll'W au opuortuBi for NVthem S?,0' lU,,kU1 iD fr id w U a'PP"" 2 approach faiinliar '.the 8oUthcr" tlL it i. quite U Zd 7"Ur' nd hoMly to'th. "rnyiirtl to glean ita foo.1. '