a 
3 
hs “a Sor the Adgancameny of Science. i. #4. Meee 
rf 2 Report on the effect of a stroke of hing on’ a tree near’ ‘Rainborgh; bys see ° # 
Pay: HILLIPS, 
te x 
On the climate of the: “valley of the Nile; by Mr. aR 
On the means of computing the wantities of ao vapor in i tbe Liman Biss 
at various emg an pa of by MrT pee 4 
‘On the daily form of Gloads at Iakorstotats MrT: Hormms, -* 7% Bis; 
the passage of t aeccing across the very Islands by Mr. R. Russe 
remarkable yy sia eee near the Moon's first quarter, ota * 
a 1839 to 1850; by : 
<) in some extraordinary electrical appearances observed at Manchester on thé Loth. . 
- of July, 1850 ; by Mr. P.O ge 
-Meteorological Phenomena ae Hggate, Yorkshire ; s by a a Rani gees ae 
I ate 
On cigpenan: Magnetic Lines in Yorkshire ; by. Prof. P: Capel oe 
estion of Probabilities obra occur’ in mri use ar a fixe collimator fpr: of 
the verification of the constancy of Position of an Azimuth Circle ; by Prof. Airy. Fae 
On the Lunar Surface, and its ae to that of the fai by Mr. Llergees es eas 
3; by 
me 
dee 
On Polygons inscribed on a Surface of the Second order; by Sir W. R. Hasuzox, 
On the Theory of Magnetic Induction; by-Prof. Tomson. 
3 7 Pee the reduced observations for six years of, e Winds i in the regions of Glasgow; 
of. 
On n some powerful Magnets made by a process adesiaid by:M. Elias, and manufac- =~ 
ou M. Logeman, optician, at Haerlem ; by Sir DaBrewster. 
e Optical Properties of Cyanure et of Magnesia and Platina; by Sir. D. 
a Geometrical Rotation between Ten Points, ona surface of the second order 
sir W. R. 
', On the de of Cs cae of Newton’s Rings in passing the Angle of total 
G. G. Sroxes. 
io nthe Distribution of Shooting Stars in the Interplanetary Spaces; by Mr. H. 
a, On E Electr Figures of Dust ou Plate one: by Mr. J. A. Brown. 
a Magnetic a exhibited by Mr Bicews 
Section B.—Cusussray, INCLUDING ITS ArPLicarions TO Acnicut- 
Ps AND THE TS, 
n the per-centage ov Nitrogen as an Index to are nutritive Value of 
; by r. A. VoELCKE 
The object of ae paper was = show, that t i usual estimation of 
the nutritive qualities of an article food is frequently attended with 
inaccuracies s, which renders it destiable to modify our present me 
plants. In order to prove experimentally the presence of am 
salts in larger quantities than hitherto suspected, and to afeid f the objec 
u 3, was found to be 0-204 per cent. for the fresh fangi, or 
182 per cent. for the dry fungi. The whole amount of nitrogen in 
