386 Analysis of Scientific Books. 
1. That the relative weights of the constituent principles of different 
eggs vary very considerably. 
2. That an egg loses about one-sixth of its weight during incubation, a 
quantity amounting to eight times as much as it loses in the same time 
under ordinary circumstances. 
3. That in the earlier stages of incubation, an interchange of principles 
takes place between the yelk and a portion of the albumen; that this 
interchange is confined on the part of the yelk to a little of its oily matter, 
which is found mixed with the above-mentioned albumen; that this portion 
of albumen undergoes some remarkable changes, and is converted into a 
substance analogous in its appearance, as wellas in some of its properties, 
to the curd of milk ; and, lastly, that a portion of the watery and saline 
portion of the albumen is found mixed with the yelk, which becomes thus 
apparently increased in size. 
4. That as incubation proceeds, the saline and watery parts again quit 
the yelk, which is thus reduced to its original bulk ; thatin the last week 
of the process it undergoes still further diminution in weight, and loses 
the greater portion of its phosphorus, which is found in {the animal con- 
yerted into phosphoric acid, and in union with lime, constituting its bony 
skeleton ; and lastly, that this lime does not originally exist in the recent 
CBE but is derived from some unknown source during the process of incu- 
ation. i 
11. On the Placenta. By Sir E. Hone, Bt., V.P.R.S. 
The observations contained inthis paper are preparatory to 
a new classification of animals, founded upon the difference in 
the structure of the Placenta. Of this classification a specimen 
is offered by the author, illustrated by 7 plates, from Mr. Clift’s 
drawings. 
12. Of the Geographical Situation of the three Presidencies, 
Calcutta, Madras, and Bombay, in the East Indies. By 
J. Goldingham, Esq., F.R.S. 
13. Of the Difference of Longitudes found by Chronometer, 
and by Correspondent Eclipses of the Satellites of Jupiter ; 
with some Supplementary Information relative to Madras, 
Bombay, and Canton ; as also the Latitude and Longitude 
of Point de Galle and the Friar’s Hood. By J. Goldingham, 
Esq., F.R.S. 
It is impossible to abridge the voluminous details of these 
papers ; weshall, therefore, merely give the results of the author's 
observations, which appear to have been conducted with the 
«utmost patience and accuracy. 
Longitude of the Madras Observatory, Eastof , , , 
Greenwich . : : . . $8017 2] 
Latitude of ditto. : ‘ ‘ 2 13.4. 9.1 N 
Longitude of Fort William. 4 se DP Deh OF ne Bee 
Latitude of ditto”. . : , : 22 33 N. 
Longitude of Bombay Lighthouse. f 72 53 36° FE 
Latitude of ditto. - : : ‘ 18 5425 WN 
