690 TRANSACTIONS OF THE 



tograpbic images taken on different nights. For this success he 

 is indebted to an improved driv^ing clock regulated by a pendulum 

 and daguerreotype plates of increased sensibility, both the work 

 of Boston artists. This means of making the heavens map them- 

 selves, will facilitate the detection, of the minute changes of po- 

 sition among the stars, which has within a few years quintupled 

 the number of known planets, and produced so many other dis- 

 coveries." 



" Mr. Peazzi Smith, made some photographical researches in 

 1856, in Teneriffe, and he found that the intensity and power of 

 those pictures taken at ten thousand seven hundred feet above 

 the level of the sea, were eminently greater than those at eight 

 thousand nine hundred feet, and those again were far superior to 

 those at the sea level. Further still, he found remarkable facili- 

 ties in the upper regions of the atmosphere for procuring the de- 

 tail of distant objects. Thus, over and over again, at ten thou- 

 sand seven hundred feet, he obtained on the Collodion plate the 

 bushes, stratification, and even the clearage of the rocks, forming 

 a chain of mountains four miles distant. But at the level of the 

 sea, wiih a similar range of mountains, and at the same distance, 

 and trying it when to the eye the sun was vigorously bringing out 

 the marking of the ravines and the clefts of the rocks, he could 

 never get anything but the outline of the mountain, filled up by 

 an even tint." 



The Liverpool photographers, think the American photographic 

 pictures of the moon a failure. Mr. Warren De la Rue, has ex- 

 hibited to the Astronomical society of Liverpool, some beautiful 

 photographs of the Moon, and Jupiter, and at the same time 

 Mr. Bond's photograph of Ursse Majoris, and the Transit of Lyrse. 

 And the Astronomer Royal was pleased to say, that the most cor- 

 dial thanks of astronomers were due to Mr. Bond, and to the pro- 

 fessional amateurs, Messrs. Whipple and Black, by whose perse- 

 verance this object had been obtained. 



Mr. R. Price, of Worcester, Massachusetts, has patented a pro- 

 cess of photographing on wood, in lieu of drawing by hand, which 

 has since been so far developed as to be pronounced successful by 

 some of our best engravers. The surface is so prepared as to be 



