396 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
influence of the illustrious Claparede, by whose advice he went to Jena 
to continue his studies under those two great naturalists, Gegenbaur and 
Haeckel, with whom the biologists of our time will always associate the 
name of that little German town. In 1866-7, Fol went with Haeckel to 
the Canary Islands, having for companions Richard Greef and Nicolas 
de Miclucho-Maclay. On his return to Europe, Fol studied at Heidelberg, 
Zurich, and Berlin, presenting at the last his thesis for the doctorate of 
medicine in the form of a treatise on the anatomy and development of 
Ctenophores. 
At Messina and at Yillefranche he devoted himself to the study of 
the development of marine Invertebrates, and in 1879 he published his 
well-known “ Recherches sur la fecondation et le commencement de 
l’kenogenie chez divers animaux.” For some time he filled the chair of 
Comparative Embryology in the University of Geneva. 
In bacteriology, photomicrography, and the teaching of histology he 
took considerable interest, and made important additions to our know- 
ledge. 
In 1892 he left Havre in the yacht c Aster ’ for the coast of Tunis, 
but the vessel was never heard of after touching at Benodet. 
A bibliographical list of 143 papers is appended to M. Bedot’s memoir. 
B. Technique.* 
Manual of Technique.! — Dr. D. Luis del Rio y Lara has published 
a manual of technical micrography. It is prefaced with a commendation 
from Dr. Ramon y Cajal. The first part deals with instruments, the 
second with reagents, the rest of the book with special methods. It 
appears to us to be a terse and clear practical guide. 
Cl) Collecting- Objects, including Culture Processes. 
Improvement in J. af Xlercker’s Arrangement for the Cultivation 
of Living Organisms under the Microscope. J — Herr A. Scherffel’s 
* This subdivision contains (1) Collecting Objects, including Culture Pro- 
cesses; (2) Preparing Objects ; (3) Cutting, including Imbedding and Microtomes; 
(4) Staining and Injecting ; (5) Mounting, including slides, preservative fluids, &c.; 
(6) Miscellaneous. 
f ‘ Manual de Tecnica Micrografica general,’ Madrid, 1893, 8vo, x. and 277 pp., 
208 figs. % Zeitschr. f. wiss. Mikr., x. (1893) pp. 441-3 (1 fig.). 
