eee ek per eee a Sa 
Miscellaneous Bibliography. 291 
yeh and the fiveantor of the “ an,” or Panties which bears his name 
so generally used in gold and silver reduction works. Mr. Randall has 
modified ~ invention by moulding its grinding surfaces in the form of 
the tracto noid. His mathematical seingro of the tractory and 
differently forined grinding surfaces given to plates in pans of various 
names, is original and ingenious. The sinctionl result claimed by t 
author for his own system is expressed in the following roe UeS : 
Tractory conoidal plates of uniform hardness = 
Conical plates of uniform hardness ==1°1042. 
Plain circular plates of uniform hardness = ‘9877. 
Randall’s patent grinding plates =1°175 2, 
e Scientific Review and Journal of the Inventor's Institute, 
leum ies in ea nited Sta tes. 
— of a Chess Knight, by S.S. HatpEeman ; Philadelphia, E. 
H. Butler & Co., 16mo.,90 pp., 114 figures; also Bibliography of 
42 pp.—This little 
1864, + 
the Chess Knight’s Tour, (same author and publishers), 
oO 
Ancients, the substance of four lee- 
on the ‘bie and Shrubs o' , hes ci mes to be aspera to 
M.D., F-BS, Prof. Bot. etc, Oxford. 
Stones and of the Metals, by C. 
Preciqua soi gs enn & Daldy.) 
arke 
W. Kixe, M.A., ue Basen fhe 
« c, M.A., author of “ Antique Gems, Motions (real and apparent) 
Saturn and its of the 
and its System, containing de Satellites and Rings, etc., ete.; 
ie -and telescopic appearance of the t Saturn, 
by iesice A. Proctor, B.A. ante by 14 engravings on steel and copper. 
London. (Lon ngman a 
Pre-historic Times, as illustrated by _— 
toms of Modern § , FR 
d the Manners and Cus- 
7s 
wy ge Caves of France and Switzerl: 
= ofl & Co. 
by Re P. Ba the EB aaeite ie mon with Memoirs of him t 
tises of J. EF | 
Anthro useum = 
account. of bis A pinta MD, ——— 
jngut Boero of John 
