162 THE RISE AND PROGRESS OF PHOTOGRAPHY. 
of the sun 18 inches in diameter show clearly markings 0 
twofold kind, some granular, and some elongated or viloy ane 
shape. A magnified examination of these markings by Fathe 
Lamey, a French pairing 6 has led to the remar kable Tiecoweeh 
that the markings on the sun and moon much resemble one 
another. Father a believes he ean trace natin difficulty, 
upon the solar pictures of Mr. Janssen, appearances that resemble 
the craters plainly shown in the Rutherfurd lunar photographs. 
a napciomens here spoken of are sbbnesmaeie of photographs 
of the moon, and are three feet in diameter. The blindin 
perseverance of Janssen, who believed in the camera, took the 
matter up and arrived at ‘the present state of progress. Ruther- 
furd’s moon pictures, and Janssen’s photographs of the sun stand 
out as two wonderful results in recent investigation, and prove 
I als y me 
ioranty ditopenad the photospheric network around the 
sun en again we have the barograph, thermograph, magneto- 
graph, anda variety of eo instruments used in the observatory 
for photographic observations, whose utility can be 
bot rch as Sg ublished pion of the cate Niahreante at Kew 
black spate ceermaie the Bagiogespher was ee Two days 
Tallow comes i oak black in the sun_ pict o hente ce must 
have been covered with very faint yellow spo, “pote ore any a 
could trace the least mark upon the skin. This is a ease af the 
invisible, but there are many visible ways of utilizing he pha 
As in adj —s pepecial P rhalg te SEpeaae to the opht 
moscope, cope, otoscope, &e., in which case medical m 
could study te various diseases at thei ir aa Negatives ‘Tike 
these prc nie for view during the lectures would be of great 
use to students. 
