THE 
JOURNAL OF SCIENCE. 
OCTOBER, 1882. 
I. EXPERIMENTATION IN BIOLOGY. 
By Oswald Dawson. 
(Concluded from page 542.) 
S N the Pangenesis chapter Mr. Darwin acknowledges in- 
debtedness to experimentation by quoting the renowned 
experiments of Brown-Sequard, and again, or rather 
previously, in the chapter on Inheritance ; also the section 
of a Nais by Lyonnet ; the amputations of the limbs of 
salamanders by Spallanzani and Bonnet, Lessona and 
Philipeaux ; the transplantation of the spur of a cock, and 
piece of periosteum, — of the tail of a pig into its back ; and, 
finally, the experiments on transfusion by Mr. Francis 
Galton. In everyone of these directions have similar expe- 
riments been performed. M. Dupuy observed the effects of 
a section of the sympathetic transmitted to the second gene- 
ration ; bicephalous planarians can be produced by an ante- 
rior longitudinal section, — it is a remarkable faCt that the 
anterior portion of a bisected earth-worm reproduces a tail 
before the posterior a head (Dr. Ch. Leteauneau, Biology, 
“ Library of Contemporary Science ”) ; the “ individuality ” 
of this creature has been studied too much ; Paul Bert 
succeeded in engrafting the frozen tail of a rat in its back ; 
experiments on the growth and inheritance of mutilated 
spleens ; experiments on transfusion and cross-circulation 
are numerous, but experiments ad infinitum in these direc- 
tions are not needed. The high value of the researches of 
M. Camille Dareste on the production of monstrosities is 
appreciated in the most genuine manner — i.e., by utilising 
VOL. iv. (third series). 2 p 
