PROCEEDINGS. OF SOCIETIES. [^""^Sll^NfyTim! 
dry objective was about 800, and as a wet objective tbe power was 
increased by about J, making the magnifying power about 1000. 
Mr. Mayall defended the paper which he had written on the 
subject of Nobert's test-lines, having taken Dr. Woodward's paper as 
it was printed. He thought that Dr. Woodward, when he wrote his 
former paper, had not carefully studied the immersion system. In 
his previous paper, he (Dr. Woodward) spoke of not finding the Jyth 
of Hartnack go as far as the J^th dry lens of Powell and Lealand. 
In the present paper he said that the ^j th of Hartnack did more than 
Powell and Lealand's J^-th or ^^th ; that is, he could define as far as 
the 15th band. He (Mr. Mayall) had said that he could not count the 
lines beyond the 12th band, and he still maintained that in a photo- 
graph no band beyond the 12 th could be counted ; the uncertain 
number of spectral lines rendered this very difficult. 
A vote of thanks was then passed to Dr. Woodward for his com- 
munication. 
The meeting was then adjourned until the 10th of November. 
Donations to the Library and Cabinet from June to Oct., 1869 : — 
From 
Land and Water. Weekly Editor. 
Scientific Opinion. Weekly Editor. 
Society of Arts Journal, Weekly Society. 
The Student. 3 Parts Publisher, 
Popular Science Review, Nos, 32-3 Publisher. 
Transactions of Linnean Society, Part 3 Society. 
Smithsonian Eeport for 1867 Institution. 
Natural History Transactions of Northumberland and Dur- 
ham, Vol. III., Part 1 Society. 
Journal of Quekett Club. 2 Parts Club. 
* Reade's Prism.' By S. Highley Author. 
Canadian Journal. 
Quarterly Journal of Geological Society . . . . Society. 
Journal of Linnean Society. 3 Parts, and Vol. XII Society. 
Retia Mirabilia Circumvertibralia. By Dr. J. Schobl . . . . Author. 
Report on Excisions of the Head of the Femur for Gunshot 
Injury. By Lieut.-Col. G. A. Otis, U. S. Army , . . , Surgeon. Gen. U. S. 
Sulla jProduzione di Alcuni Organismi Inferiori esperienze. 
Professori G. B. Crivelli and L. Maggi Authors. 
Intorno AUe Cellule del Fermento. Professori G. B. Crivelli ' 
and L. Maggi Authors. 
Intorno al Genere TEolosoma del Professor D. L. Maggi .. Author. 
A Translation and Abridgment of all the Papers relating to 
Natural Philosophy read before the Royal Academy of 
Sciences at Paris, from 1699 to 1720. By John Martin, 
F.R.S., and Ephraim Chambers, F.R.S Dr. Millar. 
Description Raisonnee des Orgaues des Plantes. Par M. A. 
P. De Candolle. 2 Vols Dr. Millar. 
Photograph of Microscopic Life. By H. Davis, Esq., from a 
drawing by H. Richter, Esq H. Davis, Esq. 
One dozen Slides of Test-objects W. W^^ght, Esq. 
Half-a-dozen Slides of Max Schultze's Siliceous Vesicles, illus- 
trating Diatom Structure . . Thos. Hennah, Esq. 
One dozen Injected Slides, from different parts of Dr. Thudi- 
chum's Trichinous Rabbit Mr. Thos. Norman. 
Immersion Fronts to Mr. Ross's ith and y 2 th Objectives . . Mr. Thos. Boss. 
Walter W. Reeves, 
Assist. -Secretary. 
