METEOROLOGY CLIMATOLOGY. 755 



The economic value of our native birds, H. A. Surface (Pennsylvania State 

 Dcpt. A<jr., 7m()I. Quart. Bid. 1 {1903), No. 3, pp. 51").— Brief popular notes on the 

 habits anil econoniic relationn of vultures and hawks. 



Studies on the food of our native birds with special reference to hawks 

 and owls, G. Rorig {Arh. K. Gesundheitsamte, Biol. Abt., 4 {1903), No. l,pp. 51-120, 

 ph. 3,fi(i. 1). — A detailed discussion of the food and feeding habits of various species 

 of hawks and owls found in the German Empire, and also certain species of crows, 

 wo()di)eckers, cuckoos, pigeons, grouse, stork, etc. Data obtained from an examina- 

 tion of the stomach contents and from field observations are presented in tabular 

 form. Special attention was devoted to a study of the pellets cast up by owls. 



Report of the A. O. TJ. committee on the protection of North American 

 birds, W. Dutcher {Auk, 21 {1904), No. 1, pp. 97-W8,pls. 7, Jigs. 2). — In this report 

 an account is given of the work of the committee of the American Ornithological 

 Union on the protection of birds, and also of the National Committee of Audubon 

 Societies. The work of these societies in various States is briefiy outlined, and r jtes 

 are given on the legislation regarding bird protection in various States and Territories. 



METEOROLOGY— CLIMATOLOGY. 



Climatology of California, A. G. McAdie {U. S. Depl. Agr., Weather Bureau 

 Bill. L, j.yp. 270, ph. 19, figs. 21). — The available data relating to pressure, tempera- 

 ture — including frost, precipitation— including snowfall and fog, thunderstorms, and 

 earthquakes for different sections of the State (north, central, and southern coast, 

 great valley, and Santa Clara Valley), and for various localities are summarized in 

 tables, charts, diagrams, etc. 



"The general climatic conditions of the Pacific coast, and particularly the climate 

 of California, may be said to be controlled by four great factors. These are: 



"(1) The movements of the great continental and oceanic pressure areas — the 

 so-called permanent 'highs' and 'lows.' Under this head we include also the most 

 active factor in climatic development, namely, the movements of individual pressure 

 areas, since there is now good ground for believing that the paths of these individual 

 disturbances — large-sized whirls and counter whirls — are largely determined by the 

 general relations of the permanent pressure areas. 



"(2) The prevailing drift of the atmosphere in temperate latitudes from west to 

 east. 



"(.3) The proximity of the Pacific Ocean with a mean annual temperature near 

 the coast line of about 13° C. (55° F.), a great natural conservator of heat, and to 

 which is chiefly due the moderate range of temperature along the coast from San 

 Diego even to Tatoosh Island. 



" (4) The exceedingly diversified topography of the country for a distance of 200 

 miles from the coast inland." 



These factors are discussed in detail. 



Climatic conditions at California substations, A. V. Stubenrauch {California 

 Sta. Rpt. 1902-3, pp. 162, 17.5, 179, 186, i55).— Monthly summaries are given of 

 observations on temperature, rainfall, and cloudiness during the period from January 

 1, 1902, to June 80, 1903, at the Foothill, Southern Coast Range, San Joaquin Valley, 

 Southern California, and Santa Monica substations. A summary of seasonal (Sep- 

 tember to May) rainfall at Paso Robles from 1897 to 1903 is also given. 



Meteorological observations, A. O. Leuschner et al. ( California Sta. Rpt. 1902-3, 

 folders opp. p. 160). — This is a synopsis of observations at Berkeley on atmospheric 

 pressure, temperature, precipitation, relative humidity, cloudiness, and direction of 

 tlie wind during the 2 years ended June 30, 1903. 



Meteorological observations at the Michigan Agricultural College for 

 1902 {Michigan Sta. Rpt. 1903, pp. 98- 12 l).-~Ta\m\a,ted daily and monthly sum- 



