Geology and Natural History. 149 
11. Acceleration of eal at Tokio, Japan.—The paper by 
Messrs. shined and Perry on a “De termination of the Accelera- 
tion of Gravity for Tokio, is apan,” published in the April number 
of the Piloponiacal Magazine and alluded to on page 130 of this 
number, has been severely criticized by Major Herschel (I. c. 
June, 1880, p. 446). A reply to this criticism is giv en by the 
ter Observatory. The former is designed to encourage the higher 
development of the horological industries, and to pursue researches 
calculated to aid in the construction of refined apparatus for the 
measurement of time. This circular fen detailed information 
in regard to the teh to which time pieces are subjected ; the 
regulations of the distribution of the time service from the 
observator y, a list of the standard instruments employed in rating 
h 
standards. The circular also contains a synopsis of the ants 
ard 
carefully considered and ably carried out. A field of great use- 
fulness is open to this department of the Winchester Observatory. 
Physical Science in America, also, cannot fai e indebted 
to it. The late report of the Astronomer Royal, nee speaks of 
observatory of which he is director, and the French Astronomers 
im many recent articles have directed public attention to the 
importance of work similar to that undertaken by the Horological 
Bureau of Yale College. e thermometrical bureau promises to 
afford valuable assistance to the United States Bigaal Service and 
- to meteorology in general, also to meio DH YEIONOE eer 
tions and to many departments in the a 
II. Grotoay anp Natura HIsTorY. 
1. Odontornithes; a lee er on the Extinct Toothed Birds 
of North America; by Professor O. C. Marsu, pp. i-x, 201, 4to, 
prin ted plates, with Appendix prem 2 a Synopsi is of Ameri- 
ith t 
