From George Gore   Decr. 25/1858

8 Broad St. Birmingham. | Dec^r. 25/1858

Dear D^r. Tyndall,
Immediately upon my return from London I succeeded in obtaining a 3^rd variety of electro-deposited antimony, apparently possessing the same heating power as the others, and containing Iodide of antimony instead of Bromide or Chloride; and I have sent you a small specimen separately by Post. It requires a higher temperature than either of the others for its discharge; a piece 5/32^nds of an inch thick placed upon melted fusible metal suddenly discharged when the latter acquired a temperature of 358 Fah^t, and lost a little of its contained Iodide. It may be safely broken at 60 Fah^t. If you should consider it advisable to mention this variety at the reading of my paper¹ pray do so.
I hope to be able to make comparisons of the specific quantities, specific heats, electro-chemical equivalents, chemical analyses, amounts of molecular heat, temperatures of sudden discharge, chemico-electric and thermo-electric relations, etc of the 3 varieties, by experiment; from which some further information will probably be gained.
By enquiring I have met with a second and independent observer of the supposed molecular discharge in electro-deposited zinc, and am making further trials to verify it.
On electrolysing a hot solution of arsenite of copper in cyanide of potassium with a copper anode, singularly to relate arsenic alone appeared to be deposited instead of the copper!.
Believe me to remain | Yours very truly | George Gore

D^r John Tyndall. FRS. | &c. &c.

CUL SC – add 7656