90 HATCH EXPERIMENT STATION. [Jan. 



sion that further work with our present equipment would be 

 unprofitable. 



The true meridian established here two years ago has en- 

 abled the division to begin a series of observations on the 

 declination of the needle. These observations are taken 

 monthly, and the readings entered in the yearly record book. 

 The results will be of value in deducing a formula for varia- 

 tion in declination for this locality, and also in making sur- 

 veys with the compass. 



The only addition to the equipment during the year con- 

 sists of an "adder," for facilitating the computation of mean 

 daily temperatures from the hourly readings on the Draper 

 temperature chart. 



At the opening of the college, in September, Mr. A. C. 

 Monahan, the ol^scrver, retired from the division, and was 

 succeeded by the assistant observer, Mr. C. S. Rice. 



