600 Chronicles of Science. | Oct., 
In the first he uses sulphuric acid and iron. In a cylindrical vessel 
of iron he places a prism of carbon, and then pours in dilute sul- 
phuric acid. The carbon and iron form the two poles. Two of 
such batteries are sufficient to cause the ordinary telegraphic bell to 
ring. ‘The batteries are said to be cheap, inasmuch as the sulphate 
of iron produced may be used in another system, composed as fol- 
lows :—In a cylindrical vessel containing a concentrated solution of 
protosulphate of iron, the author places a cylinder of zine and a 
prism of carbon forming the two electrodes of the pile. The zine 
dissolves, hydrogen is disengaged, and hydrated sesquioxide of iron 
precipitated. ‘Two elements of this kind served for an electric bell 
for several months. 
M. Zaliwski-Mikorski has announced to the French Academy 
that he finds smearing the zincs of a Bunsen’s battery with grease 
will answer the same purpose as amalgamating them. The fact 
may be as he states, but certainly he is not very happy in his 
explanation when he says that the grease acts as a body rich in 
hydrogen ; that is to say, as a combustible body. 
IX. ZOOLOGY AND ANIMAL PHYSIOLOGY. 
A Report of the Proceedings of the British Association at Not- 
tingham in reference to the subjects of our Chronicle will be found 
elsewhere. The most remarkable feature in the Meeting in this 
regard was the advocacy of Darwinism by the President, Mr. Grove, 
—as part of the Law of Continuity then enunciated by him—and 
the general support which the theory of the Origin of Species by 
modification and descent received from the leading men of Section D. 
We understand that it is proposed to hold an Anthropological 
Congress in Calcutta on a very extensive scale. The Government 
is intending to inaugurate an Exhibition of Arts and Manufactures 
in that city in 1869 and the members of the Royal Asiatic Society 
conceive that this will be a suitable and valuable opportunity for an 
exhibition of living men of various races. Calcutta is itself a city 
peculiarly fitted for such a gathering: im addition to the great 
variety of the tribes of the continent, individuals of whom are abund- 
ant within its walls, Chinese, Malays, Andamanese, Singalese, Poly- 
nesians, and Australians are to be found amongst the shipping, and 
no doubt a large number will be attracted by the exhibition. The 
Council of the Asiatic Society have accordingly addressed the Indian 
Government for assistance in carrying out their scheme, with a 
partial success, and there is every reason to believe that such an 
exhibition of men as was never before witnessed will be visible in 
