482 Miscellaneous Intelligence. 
to the next 1,000 meters, and a rate half as fast for 00 meters 
beyond; that better arrangements for carrying up air or oxygen 
to supply the breathers may be of service; that man thes soon 
described a new instrument invented by him which pany prove of 
the highest oles in surveying, especially in hydrographic sur- 
veying. It is based upon the principles of the common waa 
but by it to adjacent angles can be at once measured 
observer. Immediately after the oe 3 Spey moreover, the in- 
strument without change can be laid as a protractor upon the 
chart, and the place of the observer sat ook down, the principle 
involved a — of the “ —_ point problem 
. Mea ght of Hurope—Dr. Gust av Ler , in a re- 
A published work on she “ Mean Height of nen 3 after an 
elaborate calculation founded on a broad basis of measurement, 
— that it is 296-338 meters, — meters oe than the cal- 
culation of A. von Humboldt, who indeed made out the average 
altitude of all the land on the “earth to be about 308 meters. The 
- ©. Datron on the origin and propagation of diseas ; HerM- 
HOLTZ on mathematical theories; CrerK Maxwe wt on aeuin at 
a distance; B. A, Goutp on the Calobe Observatory; E. Maitry, 
estimate of the population of the world; A. Morin on warming 
and ventilating occupied buildings; E. L. pe Fo REST, additions 
to a memoir on methods of interpolation applicable to the > gradu- 
AK 
erica; H. Senxans on a grammar and dictionary of 
the Cavil language ; H. Girman - the scm tei and platy- 
enemism in Michigan ; T. M. Perrine on the. antiquities of 
Union Co., Mlinois; W. H. but on exploration on the western 
coast of N, America W. M. Pierson on the discovery of a large 
meteorite in Mexi . R. Brunor on the habits of the Beaver; 
S. JEVons on a pe em iheerys and a list of Prize Questions 
issued by Scientific Societies. 
6. Expedition Jr = Geological und Geographical Survey of 
the Territories, for —The amount appropriated by the last 
Congress for the U. s. "Geological and Geographical Survey of 
the Territories under the directio on of F. V. Hayden was $75,000 
1 ss 
Six parties will take the field in various portions of Colorado 
about the first of June. Mr J. T. Gardner will carry the primary 
triangulation of the area between lat. 36° 45’ and 39° 15’; long. 
