526 Obituary — Charles Spence Bate. 
CORRESPONDENCE. 
RATE OF SUBAERIAL DENUDATION. ’ 
Srr,—Referring to Mr. Davison’s paper in the September Number of 
the GronogrcaLt Magazine, it will not do, as I have endeavoured to 
show in ‘Stellar Evolution,” to take the average rate of denudation 
of the seven river basins which he names, as in any way represent- 
ing the mean denudation of the whole earth. The majority of these 
rivers are exceptionally muddy, indicating a very high rate of 
denudation: much above that of the whole earth. 
PERTH. JAMES CROLL, ~ 
THE FULLERS EARTH OF NUTFIELD. 
Erratum.—Mr. P. Gerald Sanford regrets that some mistakes 
occurred in the setting up of the figures of his analysis of the ‘ Fullers’ Earth.” 
Grou. Mac. October, 1889, p. 456, which he desires now to correct. 
No. 1. Buuve Earrs. 
Dried at 100°C Insoluble Residue. 
Insoluble Residue 69-96) per cents —isiO> = 62°81 per cent. 
Oxide of iron, Fe,0, = 2°48 INO ee BG yk 
Alumina, Al,03 = 3°46 e503) =) 15380, 
Lime CaO = &§ 87 CaO = 188) op 
Magnesia, MgO eee MgO = OG >: 
Phosphoric acid, P20, = 0°27\ Solube -—— 
Sulphuric acid, SO; = 0°05/ in acid. 69-96 
Sodio Chloride, NaCl = 0:05 
Alkalies, K20 Ss Word 
Combined Water = 15-57 
99°86 P. G. SANForRD. 
OS ao PASE pa 
CHARLES SPENCE BATE, L.D.S.R.C.S. Ene. F.R.S., Ete. 
Born 16 Marcu, 1818; Diep 29 Juty, 1889. 
Cuarues Spence Bate was born at Trennick, Truro, on the 16th 
March, 1818. He was the eldest son of Mr. Charles Bate, who for 
many years practised as a dentist in Plymouth. He was educated 
at the Truro Grammar School under the late Dr. Ryall. On leaving 
school he entered the surgery of Mr. Blewett, where he remained 
about two years; he then devoted himself to the study and 
practice of dentistry with his father. After becoming duly qualified, 
he removed, in 1841, to Swansea, where he soon acquired a consider- 
able practice. While at Swansea he developed an ardent love for 
Natural History, by his knowledge of which he afterwards became 
distinguished. He was speedily associated with all the scientific 
men of the place; and on the occasion of the visit of the British 
Association to the town in 1848, he took an active part in arranging 
for the reception of that body, and became one of its members. 
On more than one occasion subsequently he was President of one of 
the Sections. He was mainly instrumental in securing the visit 
