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Show .MriKtIll 'STllANMT. IT MILL 1'AM OVrilTIIK tU.N'alJISO IA lb rrofcwir Hoi Icnnflho Lick OIerv.. tory funilahe tlicf dluwlng data con ci ruing tha lMii.lt of Mercury uvi Iho pun's dlsu whl, h wllloccun-onti arti ruooii uf Ma. Oils nexli Tim lugn-M of Hi" plant 1 on the u 11' surface will In, vlalt lu alx nt .1.31 p. m. Hie Inxrea. take pht-e alter an 111 1 The diameter of Mer 11 ry will Ihi about 11! 111I11., su that It will la. ueiimry tu usu n (owerful field glass or a tele scope to see the hrnomrliou. Th eyu should la- shielded I y n cob real kIais. In order to niaku ulfervatlutis uf a-trouomlcjil value It la rnpialtu to emtloy ft UiIocoe uf at liast twn tuclie, nia-rlurw ant a magnifying lower of nt least thirty illume or, ami to note tho exact tlmo of Internal Inngeiicy of tho tmrdera nf Mirnirj andthuauu. Thu external taigency tntd nut be pluurvrd exi ept with cnn-imratl cnn-imratl vo tt lescopi s. Tu know win re In look fur Ukiap, "nn Ihu noilli and east lo'iit ot the sun's lioriitr In thu Held of view ofjotir tilrsco, e. IMI. matu frum tbonorth iulntnn angtoof IIO; that I. to thooa-tailut(OJ)aid beyond (2H). Thu lugresi will laku placw at the laat nilmil lolut. Hen that the telescoiar give, a sharp Imago otthosut'e borittr. Afttrthuplatiet haainailua notch In thu sun's ttlge, about f ur ptcouds rill elae la-fure Internal tontait. .Vote the tlmu nf thl contact nd note aln the tlmu when Ihecon' haa paiaVil an I thn first thin tl r 1 ot sunshine Just become vlalble .men the i lanet and the eilgu ofthesuu. In nrler Io make Iho oh. servatlon. aluablo watcbo must be coiuarcd with thu Lick Oh.ervatory railway tlmu signal nt noun on May Oth, nnd (the walch remaining un touched) on May luth. Auyauch oUervatlon. sent to Iho Lick Observatory will U thankfully rect lve.1 and acknowledged aud duly utllliitl. riionrlglualruugh uotes of olurvatlon. and walch comparison, should bu sent a well a n fair lopy. Theexait llmi.of loutact hae tieen comtiuted aud can bo found In the I ubllcntluiia nf the Astronomical Ho-clety Ho-clety of thu Pacific, volnmu III, pugo 07. A. thu tables of Mercury from which tlmo wiro calculated aru not satlfactory,these limes are Ilk ly tu bu somewhat too UK It Is tho ol Ject of our ols-ervatlon to obtolu data for cor-ret cor-ret Hug tlio tables. |
