250 PKOCEEDINGS OP SOCIETIES. 



manner. He adduced the conduct of the Government at Washington 

 as an example for our own to follow, in taking note of any of theii* 

 naval officers who displayed scientific tastes, and in furnishing them, 

 when sent to foreign stations, with microscopes ; the results of their 

 researches being regularly transmitted to head-quarters, and, after 

 being carefully examined by competent judges, were preserved, if con- 

 sidered worthy of preservation. 



Mr. E. Richards exhibited a novel and simple form of " erecting 

 mirror," made to surmount the eye-piece. It consists of a glass 

 reflector, platinized on the front surface, thus getting rid of the 

 second image, always seen when an ordinary silvered surface is 

 employed. The little " erector " can be adapted for the small sum 

 of five shillings to any instrument, and, it need scarcely be explained, 

 will be of great service in making dissections or in viewing live 

 objects, in a trough, as the microscope can be maintained in the 

 upright position. The dissecting needles or knives are not reversed 

 by it, as might have been exj)ected ; for after having adjusted the 

 focus, by simply tui'ning the mirror on its axis one quarter from the 

 right hand, the needle held in the right hand is immediately brought 

 into a jiroper position. The definition or perfection of the image is 

 in no way impaired, and therefore it will be found useful in drawing 

 as well as dissecting. 



Donations to the Library and Cabinet, from June 7th to Oct. 4th, 

 1871 :— 



From 



Land and Water. Weekly The Editor. 



Journal of the Society of Arts. Weekly Society. 



Nature. Weekly Editor. 



Athenseum. Weekly W. W. E. 



Journal of the Linnean Society, No. 3 Society. 



Transactions of the Linnean Society, Vol. XXVIL, 



Part 3 Society. 



Observations and Experiments with the Microscope on 



the Chemical Effects of Chloral Hydrate, &c., on the 



Blood. By T. S. Ealph, M.R.C.S.E Author. 



Transactions of the Natural History Society of North- 

 umberland and Dm'ham Society. 



Popular Science Review, No. 40 Editor. 



Kalendar Companion to the Peerage and Baronetage, &c. 



1870 J. W. Stephenson, Esq. 



Clergy List for 1870 Ditto. 



Proceedings of the Academy of Sciences of Philadelphia. 



1870 Academy. 



Smithsonian Report for 1869 Institution. 



Transactions of the Connecticut Academy of Arts and 



Sciences, Vol. I., Part 2 ; and Vol. II., Part 1 .. Academy. 

 Zum Bane und der Natur der Diatomaceen. Von Dr. 



Adolf Weiss Author. 



Bulletins de I'Acade'mie Royale des Sciences, &c., de 



Belgique. 1870 Academy. 



Annuaire de I'Acade'mie Koyale des Sciences, &c., de 



Belgique. 1870 Ditto. 



Suir ultimo Stadio del Colera Asiatico. Del Professor 



F.Pacini Author. 



Le Globe. Tome X. 1871. 



