278 REPORTS ON THE STATE OF SCIENCE, ETC. 



The apparatus used was patterned after that designed by van Orstrand 

 with some changes made to facilitate operation of the equipment. A 

 depth of 5,000 ft. has been reached. Under favourable conditions a 4,000-ft. 

 survey could be completed in one day. 



The reliability of measurements with this type of apparatus was demon- 

 strated by the re-survey of some wells after a lapse of several months. The 

 comparative average temperatures obtained by the author and by van 

 Orstrand for one well are shown in a table. This check made with different 

 sets of thermometers is so close as to show that satisfactory results can be 

 obtained by this method. 



All tests were corrected using the stem correction formulated by the 

 U.S. Bureau of Standards. 



Factors affecting measurements are discussed. 



In an attempt to determine whether or not a relationship exists between 

 earth temperatures and geologic structure, the author has compared both 

 isogeothermal surfaces and the distribution of reciprocal gradients with 

 geologic structure. He concluded that in general the work in California 

 indicated that the isothermal depth was a more reliable medium of com- 

 parison than the reciprocal gradient. This is explained by the fact that 

 shallow temperatures seem to be more seriously affected by artificial condi- 

 tions than do deep temperatures, and this would tend to affect the gradient 

 of a well to a greater degree than it would the depth of the ioo° isotherm. 



Geological conditions under which the measurements were made and 

 the types of wells used are described. Temperature determinations in 

 thirty-three wells in the Santa Fe Springs fields were made. The depth- 

 temperature curves for these wells are shown in figures 9 to 41. A table 

 showing the geothermal data is given. 



Geothermal data for forty-three wells in Long Beach Oil Field are shown 

 in a table. 



Conclusions from the study of the data presented, for both the Santa 

 Fe Springs and Long Beachil O Fields, are drawn. 



Prediction of Temperature inside Mountains. 



By Mario Bossolasco. 

 Ergdnzungshefle fur angewandte Geophysik, vol. 1, no. 2, 1930, pp. 149-155. 



After a few remarks on the practical value of different methods for the 

 prediction of the temperature of rocks inside mountains, the author 

 mentions the importance of the position of the strata for the solution of 

 these problems and explains by this the high maximum temperature which 

 was found in the Simplon Tunnel. 



He shows that the normal course of the geo-isotherms cannot be affected 

 in a sensible way by hot springs. This is in contradiction to a confirmation 

 made previously. 



Geothermal Observations in the Stebnik i Well. 



By Stanislaw Zych. 



Institut de Geophysique et de Meteorologie de VUniversite de Lwow, vol. 4, 

 Communication no. 44, 1929, pp. 844-848. 



Temperatures measured on December 2, 1927, at different depths in the 

 Stebnik 1 well (near Boryslaw) are given in a table. 



