Srniths<^nian Report, 1912. — Barne 



Plate 1. 



The Microthermometer in the Laboratory Ready for Testing. 



This iiistruinciit will autoniiitirally record tlif niir-tlKiiisaiiiltli dI' a (U'i;rec of tt'inin'raluro as 

 easily as an ordinary (heniionicter rccurds onc-lriilh. 



