276 Scientific Intelligence. 
author, Mr. R. C. Taylor has died, and this second edition has been 
the subject ‘of Coal, both scientific, practical, and commercial, a result of 
exlensive personal knowledge of Coal mines and Coal, as well as of 
the literature of the subject. Me ecaasti the subject of iron, particu- 
larly the iron trade—as it is so often a part of the industry of ac 
region—came in incidentally and added greatly to the useful char- 
acter of the work. In preresee the new edition, the work has been 
rendered more especially American, by enlarging the American part 
both with respect to the subjects of Coal and Iron, while the chapters 
treating specially of other parts of nol world, have been omitted. 
These additions have been made with c d Elfanes: and the work 
is in itself a library on Coal, Coal Sownations;, all kinds of combusti- 
ble 
of different parts of the country and the world. New maps on the 
Coal formations of lowa, Wisconsin, Illinois and Alabama have been 
added from the publications of Dr, Owen and Prof. Tuomey. 
Ill. Botany. 
1, Sexual reproduction in the Lower Cryptogamia.—The reprint of 
Henfrey’s Report in the numbers of this Journal for January an 
455 
tute of any integument; but after some hours a membrane of cellulose 
begins to form on their surface. In experiments upon these dicecious 
j v be submitted to the action of the antherozoides, SO 
come into direct contact with the naked spores ;—or the latter may 3 
kept aeatine from the former. In the first case. the spores are fecun- 
dated and germinate : in the second, they do not germinate a On 
ee the spores in water containing some antheridia, the antherozoides 
re seen under the microscope to attach themse Ives in great numbers 
to ae surface of a spore, and even to communicate to it a rapid rota- 
tory movement, lasting for about half an hour,—which movement, 2s 
Thuret satisfied himself, was caused solely by the conjoint action 0 of the 
