150 Miscellaneous Bibliography. 
to his fellow baie ta by whose codperation alone could this labo- 
rious AAs ve been brought to a compact and scientific unity. 
sen Sine of — Spit Telegraph. A Handbook 
for Blectriviane = Opera By Franx L. Pops. 128 pp. 
8vo. New York, 1869. (Ruseell Brothers.)—This is by far the 
best ees and discussion of the American System of Tele- 
graphie Practice which has fallen under our notice; and does 
credit to che erudition ‘and he de skill of the author. It is 
well known that in every art mvolving the use of scientific prin- 
u ] 
American poner of telegraphic practice which for the most part 
are very imperfectly discussed or altogether ignored in the more 
elaborate treatises of electricians. Mr. Pope modestly disclaims 
the character of a scientist, but his work shows a  ongte of famili- 
a secure it a high place and general = or. 
he Mississippi Valley; its Physical Geography, including 
hacks of the wh A vo Climate, Geology, and d Mine- 
ral resources; and of the progress of deve opment in Dp ulation 
and material wealth; by J. W. aps LL.D., i 
American Association for the Advancement of Science, [for the year 
1869.] 444 p. 8vo. Illustrated by maps and sections. Chicago, 
dee (S.C. Griggs < & i )—In this volume the author discourses 
na popular style o hysical geography, geology, and re 
sources of the Missinsippi nt Valley i The york iit not elaim to be 
the result of original ete = =e ye extent, or to com: 
plete in the treatment of its topics. It is a readable Sock containing 
much valuable information, The author does not confine self 
to the valley, but has reed pages on the general subject of cli- 
mate, the ae of prairies, ete., and embraces at times the whole 
country and nation in his widely ranging observations. He closes 
his work with brief chapters on the influence of climate on — 
origin of civilization; colonization and progress of populati n in 
the valley; the Indians. The paper, printing and external appear 
ance of the volume are excellent 
5. vie ee of the > hia considered from @ Conlegies 
point of view ; by Samuen Mossman, with a map and di me cet 
. i : Wm. Blac! wood 
