1G& Scientific Intelligence. 



Xo. 264. An analysis of the effects of selection ; by A. H. 

 Sturtevant. Pp. 68. with frontispiece, text figures and tables. 



Xo. 265. Duration of the several mitotic stages in the dividing 

 root-tip cells of the common onion: by Harry H. Laughlin. 

 Pp. 48, with charts, diagrams and tables. 



Xo. 266. Effect of alcohol on psycho-physiological functions; 

 by Walter R. Miles. Pp. 144. 



Xo. 267. The atomic weights of boron and fluorine; by Edgar 

 F. Smith and Walter K. Van Haagen. Pp. 65. 



Xo. 269. The fruit of Opuntia fidgida; a study of perenna- 

 tion and proliferation in the fruits of certain Cactacea?; by 

 Duncan S. Johnson. Pp. 62. 12 pis. and frontispiece. 



3. New Outline Map of the United States on the Lambert 

 Projection. — The U. S. Coast and Geodetic Survey reports the 

 completion of the new outline map of the United States on the 

 Lambert Conformal Conic Projection, scale 1-5,000.000. dimen- 

 sions, 25 X 39 in. (price, 25 cents). This map is intended as a 

 base to which may be added any kind of special information 

 desired. The shoreline is compiled from the most recent Coast 

 and Geodetic Survey charts. State names and boundaries, prin- 

 cipal rivers, capitals and largest cities in the different states, are 

 the only information otherwise embodied. The map is of special 

 interest from the fact that it is based on the same system of 

 projection as that which was employed by the armies of the allied 

 forces in the military operations in France. To meet those 

 requirements and at the request of the Army, special publications 

 were prepared by the Coast and Geodetic Survey. 



The Lambert projection is well adapted to large areas of pre- 

 dominating east and west dimensions as the United States where 

 the distance across from east to west is 1 4/5 times that of the 

 distance north and south. Special features of the Lambert pro- 

 jection are briefly as follows: 



1. The Lambert projection is conformal, that is, all angles 

 between intersecting lines or curves are preserved ; and for any 

 given point (or restricted locality) the ratio of the length of a 

 linear element on the earth's surface to the length of the corre- 

 sponding map element is constant for all azimuths or directions 

 in which the element may be taken. 



2. The meridians are straight lines and the parallels are con- 

 centric circles. 



3. It has two axes of strength instead of one, the standard 

 parallels of the map of the United States being latitudes 33° and 

 45°, and upon these parallels the scale is absolutely true. The 

 scale for any other part of the map. or for any parallel, can be 

 obtained from Special Publication No. 52, page 36, U. S. Coast 

 and Geodetic Survey. By means of these tables the very small 

 scale errors which exist in this projection can be entirety elimi- 

 nated. 



