ABSTRACTS 



Authors of scientific papers are requested to see that abstracts, preferably 

 prepared and signed by themselves, are forwarded promptly to the editors. Each 

 of the scientific bureaus in Washington has a representative authorized to for- 

 ward such material to this journal and abstracts of official publications should 

 be transmitted thru the representative of the bureau in which they originate. 

 The abstracts should conform in length and general style to those appearing in 

 this issue. 



GEODESY. — Triangulation along the west coast of Florida. Clarence 



H. SwicK. Special Publication No. 16, U. S. Coast and Geodetic 



Survey. 1913. 



This publication gives the results of triangulation done by the Coast 



and Geodetic Survey and the Engineer Corps, U. S. Army, on the west 



coast of Florida from Cape Sable to the Alabama boundary and from 



the inland town of Gainesville to the coast at Cedar Keys. This, to- 



gether with Appendix No. 6, U. S. Coast and Geodetic Survey Report 



for 1911, gives all the available triangulation data for the State of 



Florida. 



Altho only of tertiary accuracy, this triangulation has a great prac- 

 tical value in that it furnishes to the geographer and to the engineer the 

 geographic positions of more than 1150 points all correlated on one 

 geodetic datum. The observations involved extend over a period of 

 more than sixty years and some of the stations are lost, but in the bays 

 and harbors and at other important places along the coast new triangu- 

 lation supplements the old, and, as a rule, the more recent points are 

 permanently marked and may be recovered without difficulty. There 

 is given the latitude and longitude of each station and the azimuth of 

 each line observed over; also all available descriptions of the location 

 and marking of the stations. A series of sketches and an index of 

 stations make it possible to find readily the data for any point or locality. 



C. H. SwiCK. 



GEOPHYSICS. — Note on the temperature in the deep boring at Findlay, 

 Ohio. John Johnston. Am. Jour. Sci., (4) 36: 131-134. 1913. 

 A record of a series of temperature observations made in a hole 

 drilled to a depth of 3000 feet in the neighborhood of Findlay. The 

 temperature gradient in the sedimentary rocks at horizons between 

 1100 and 2600 feet proved to be about 0?41C. per 100 feet, which is 

 smaller than what has been considered the common average value of 

 this gradient. J. J. 



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