70 
REPORT —1854. 
of thin coloured glasses in front of the lens, and thus prevent one part being over¬ 
done before another had impressed Itself on the plate. 
ns °f applying Photography to War purposes in the Army 
'Navy. By Samuel Hiohley, F.G.S ., F.C.S. 
On the Means 
and, __ _ ____ 
A field camera, with all requisite apparatus, mounted on a large pair of wheels, 
which, together with the handle, formed the tripod stand, arranged to be rapidly 
moved from point to point and be managed by one person, was described; together 
with a naval camera suspended by gimbals on a tripod stand, with counterpoise wright 
and compensating focusing movement, to render it as independent aa possible of the 
ship s motion ; the object of both being to report, by means of pictures, the position 
of troops, forts, or other military works. 
On the Hyposulphites of the. Organic Alkalies. By Henry How. 
Mr. How had succeeded in obtaining the hyposulphites of the organic alkalies by 
digesting them with sulphide of ammonium in open flasks. They are a very remark- 
able class of compounds, sparingly soluble in water, and highly crystullizablc. Those 
strychnine and codeine are extremely beautiful compounds. 
On a /Stereoscopic Cosmorumic Lens, designed by G. Knight. 
This is a modification of the instrument invented by Sir David Brewster. The im¬ 
provement consists in employing, in place of the two small semi-lenses, one large one, 
wmen is rendered stereoscopic by cutting an ordinary plano-convex lens m »«'» 
removing more or less of the opposite outer diameters, and then transposing the piece* 
lu • TS"".' 1 centre 0 f t h c i ens becomes the two sides, and the outer edge* com* 
t % in . e mu * ( * le - The advantages obtained by this arrangement is an increase 
laciti y lor viewing as ono tho double pictures. Only one adjustment is necessary 
double picture V ‘ Z ’ i “ CMlwin * or diminishing tho distance between the lens and ta. 
On the Equivalency of Starch awl Sugar i\ 
By J. B. Law as, F.C.S., and Dr. J. H. Gilbe 
BERT, F.C.S. 
of, and Methods of estimating. Ammonia and Nitric Add 
r. By J. B. La WES, F.C.S., and Dr. J. H. Gilbert, 
it in rain « , vrcul observed its presence in the Seine; and in 1825 Brandes 
subioet na if" ^‘ n , c l * ,at time much more minute attention bad been pa- 
and J ° n* i° tf '° P rL ‘» c, »c*of nitric acid in meteoric and other waters- 
monin caS" *“!? V^Aav]y called attention to the influence which 
xT llu ; «*»«pberr f must have upon the growth ofpI«J«- jn 
considpmW T id'dosopbers pointed out the occurrence of nitric aci - 
de^: form, °*' C which lie examined ; especially Am*** 
hM « Ifi0 “ nitric add in See* 
labours KnlS 8 1!*' 1 ! & " d 1,1 the Sou,h (lf Ireland- But it is to the more 
nations of thi ^ Sai , tllnl wc ar " indebted for our most elaborate quanU^e *^ 
of qua, timUv! » ‘. n rni " other waters; and M. Barrnl 
the fSn wn er iS'Tn 0 " 8 * ,f b, .' tb ‘be nitric acid and the am.iu.ma con 
It was chiellv w i,| Cl . c - at ^ ar i 5 » during several consecutive months, t j, ( 
authors had entonvl * Vlewto Hie agricidtural hearings of the stibjec , 
authois had entered upon the same field of investigation; but the object 
