1837-] Mr. Crosse's production of Artificial Crystals and Minerals. 425 



crystals, resembling those of the cave : in order to ascertain whether 

 light had any influence in -the process, he tried it again in a dark cellar, 

 and produced similar crystals in six days, with one fourth of the voltaic 

 power , He had repeated the experiments a hundred times, and always 

 with the same results. He w T as fully convinced that it was possible to 

 make even diamonds, and that at no distant period every kind of mine- 

 ral would be formed by the ingenuity of man. By a variation of his 

 experiments he had obtained green and blue carbonate of copper, 

 phospate of soda, and 20 or 30 other specimens. 



Mr. Crosse having also observed in a cavern in the Quantock Hills 

 near his residence that the part of it which consisted of slate was 

 studded, with crystals of arragonite, while the limestone part was 

 covered with crystals of ordinary carbonate of lime or calcarious 

 spar, subjected portions of each of these substances in water to long- 

 continued galvanic action, and obtained from the — 



Slate Limestone 



Crystals of Arragonite. Calcarious Spar. 



It was mentioned to the Section on the following day, that although 

 no doubt could be entertained of the independence>and originality of 

 Mr. Crosse'? experiments, yet that he had been anticipated, in the 

 artificial production of many of the crystallized bodies which he had 

 formed, by M. Becquerel, and some other French chemists.— Phil, 

 Mag. No. 5% Sept, 1836— p. 228, 230. 



The following is a statement of the new and renewed Grants of Mo- 

 ney for the advancement of particular branches of science, which have 

 been made by the Association at this Meeting. 



Mathematical and Physical Science. 



250/. For the discussion of Observations of the Tides ; at the disposal 

 of J. W. Lubbock, Esq. 



150/f. For the discussion of Observations of the Tides in the port of 

 Bristol ; at the disposal of the Rev. W. Whewell, 

 701. For the Deduction of the Constant of Lunar Nutation ; under di- 

 rection of SirT. Brisbane, Mr. Baily, and Rev. Dr. Robinson. 

 30/. For Hourly Observations of the Barometer and Wet-bulb Hygro- 

 meter ; at the disposal of W. S. Harris, Esq. 



100/. Renewed grant for the establishment of Meteorological Observa- 

 tions and Experiments on Subterranean Temperature; at the 

 disposal of a Committee, consisting of Prof. Forbes, W. S. Har- 



