152 Scientific Intelligence. [Ave. © 
author of so many original works, especially relative to the history 
of the human species, should have condescended to commit pla- 
giarism on a writer, who, whatever mevit his laborious works may 
be allowed to possess, cannot possibly lay claim to a single original 
idea relative to the subject in question.~“‘The-fact is, that Blumen- 
bach published his classification of the human species as early as 
1779, in the first edition of his Manual of Natural History; and 
afterwards (1781) in a new edition of his work De Generis Humani 
Varietate, &c. In 1788 the same division was adopted by Gmelin 
in his edition of Linnzus’s Systema Natura, t. i. p. 23, seq. where, 
without mentioning the source from which he has derived them, 
he substitutes five names perfectly improper for designating the 
varieties of the human species. —Suwm cuique ! 
Believe me, my dear Sir, 
Your very obedient servant, 
British Museum, June 24, 1815. Cuarves Konig. 
VIL. Orthoceratite in a Marlle. 
(To Dr. Thomson.) 
DEAR SIR, ; 
Those of your readers who feel interested in Dr. Fleming’s inge- 
nious paper on orthoceratites will find in the Philosophical Trans- 
actions for 1757, article 104th, a valuable description of a shell of 
the same species, discovered in a marble table at an inn in Ghent. 
~The marble was of a coarse grain, and dusky brown colour, inter- 
spersed with streaks of white. It was 2 feet 47, inches long—a 
concamerated tube, of a slender conical figure, and consisted of 66 
partitions or concamerations, all filled with the stalactical matter of 
the marble. _ Lam, Sir, yours, &c. » 
Aberdeen, 1815. M. W.- 
VIII. On the Extraction of the Cube Roots of Binomials. é 
By Mr. Lockhart. 
(To Dr. Thomson.) 
SIR, 
The utility of a method for extracting the cube roots of binomials 
being well known to your algebraical correspondents, 1 am anxious. 
that the one which I have given should, if correct, be established 
past all doubt. 
Your correspondent, Mr. Atkinson, supposes that I have made a 
mistake in respect of the root relating to ¢, Let it be tried by the, 
proper test of an equation. 
x — 252 7 = 1296 
Where z = 18, = 12, 0=6 3 
Then —¢ = 4/ 648 + J — 172800 + 4/648 — aJ — 172800. 
. The cube root of the first number is — 6 + 4/ — 48, not 
' 
~6 — / = 48, as corrected by Mr. Atkinson. ake 
