450 Miscellaneous Bibliography. 
twelve hundred pages each. Though too extensive, perhaps, and 
di t, for many besides special students and professional engin- 
eers, it will still, we hope, meet with such favor as to remunerate 
the enterprising publishers for undertaking to place before the 
country this invaluable Thesaurus of Theoretical and Applied 
Mechanics: 
hod of predicting by graphical ig sala baie 
Fa seas of pa by the ee and solar Eclipses, for any 
place, together with more rigorous methods of r reduction ee ‘the 
accurate oh ae of ong ittude ; by Francis CRANMER PEN- 
ROSE, F.R.A.S. 50 pp. folio, wih ee plates and sets of skel- 
eton forms. Fak Macmillan & Co.—The title of this volume ex- 
plains very well its scope. It is designed to furnish the amateur 
astronomer, the sailor, and the traveler with such facilities as will 
make the use of occultations for the determination of longitude easy 
and attractive. 
Three charts contain scales of use in the graphical constructions, 
and fourteen tables are added to facilitate the reductions. Ten or 
fteen minutes of labor in making the eae completing the 
computations, and working upon the chart, suffices to bring out for 
any given latitude and longitude, a eke differing not more 
Bs three minutes from the truth. 
. Smithsonian Report for 1868.—Prof. Henry here reviews 
s. explorations of the continent which have been in recent pro- 
gress, some of which have ived assistance from the Smithso- 
“Smithsonian meteorological “stations and observers from 1849 to 
1868,” which follows, Sostpire 4 pages. The “General Appen- 
dix” containing jimporta AL caely mostly translated from foreign 
journals, covers 340 pages of the Report, and gives it great scien- 
tific value. Among them are memoirs of Cuvier, Oersted, Schén- 
in, Encke and Eaton Hodgkinson; memoirs on the mechanical 
theory of heat, by J. Miiller; Radiation, by Tyndall ; Synthetic 
ements, relative to meteorites by ae cations of me- 
y Epwarp D. Co nsa 
American Phileco phical Society, Philade clph ia, rene 1869. 
Part I, 4to, with 12 plates—The author regar ards the Batrachia 
and igen as distinct classes. The latt and he divides into i 
a, Osa 
ilia, Pythons omorpha, Ophi idia. ’ The. cae structural 
orien are well expressed in his synopsis. e present 
cludes the Batrachia, the Jehthyopterygia, and Phat portion of 
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