304 Miscellaneous Intelligence. , 
ship towards myself, and afterwards did wh a obtain through my in- 
fluence a position with a Government expe 
I have respanehily to — that you will “publish this communication 
in your valuable Journa I am, Sir, very respecttully, 
Isaac J. Srevens. 
3. Dr. ee Disclaimer.—Editors Silliman’s Journal :—Gentle- 
me u-wili confer a favor by stating in the next number of your 
valuable jonee that the authorship of the Chapter on Meteorology in 
Cooper and Suckley’s work on the Natural ora? oi ieee nee me 
ritory should be accorded to the Hon. Isa c I. Stev who se 
been sent to all the owners of ¢ 
Very respect your ‘abit servant, GrorcE SuCKLEY. 
=f York, July 31, ae 
4, Stereoscopic Csteirleeries by Exr W. Braxe, Jr—Pr of. H. W. 
Dove, to whom we are indebted for so many beautiful stereoscopic exper 
iments, in his Optische Studien,* gives a specimen of stereoscopic nid 
ing to ‘Tlustrate the double refraction of Iceland Spar, as seen in beno 
7 vision. 
This effect is produced by printing for the left eye, lines in the ordinary 
manner, while for the right eye, the alternate lines are slightly advanced. 
class of literature can gen sity dol com T annex, as an example © 
this mode of printing, a stereoscopic advertisement of bond besa which 
_ The steamer’s position was lat. 44° N.; Tou . 124° 30’ W., and, wi 
sequently, some 20 miles N. W. of ‘Ui qu a river, in California. ' 
stars shone brightly ov erhead and the atmosphere was perfectly calm, a 
mist-ri was surrounded by an eaeicnely marked halo of abou 
dia aging whose colors were blue, pearl-white and sora the blue 
color nearest to the moon. The halo lasted from 15™ to 20™, its colors 
gradually fading, until they were no lone distinguishable, though the 
bright inner mist-ring continued much lo on . When it had disappeared 
Stars were visible to within 15° Of the horizo 
* Optische Studien yon H. W. Dove. Berlin, 1859. 
