MEMOllIS OF TllK NATIONAL ACADK.MY OF SCIKNCKR. 33 



fpssful study of this cHoct of climate or woatlu'i- on health tliat wo siioiihl siipphMiieiit tiio ineteoro 

 higieal charts bj- some (U-seriptive narration to moro nearly complete the record. Kecnrrinfj a^ain 

 to tho diagrams wc lind au increasing tcMidcncy t« .storm from early morning until 'J a. m., and 

 theu the slight l)reak at 10 a. ra. which has been recorded for other climat«>s also, and then the 

 increasing tendency up to the highest temperature and wind velocity of "J o'clock followed in this 

 record with more than a moau storm condition till '•• p. tn. 



CONCLVSION. 



Wc have thus far, in all tho various aspects of treatment of this case, found inafhrr a fa<tor 

 more or le.ss potent in the annual comiiari.sons; in the semiannual, <iuarterly, and monthly, in 

 the -'spells" belonging to any ''tyiJC," and in the diurnal we lind correlation between pain and 

 weather. Aiul doubtless in the decenidal periods, if such shall be demonstrated to exist, we 

 should tind a correspoiuling response. 



Tn writing of this record, which was begun September, 1871, it may be proper to state that 

 every eftbrt has been made to eliminate all mental bias or i)reconceived notions of <M)nclusions not 

 warranted strictly by reconleil facts. Facts them.selves are very dillicult to properly record, and 

 reipiire much thought and experience. Any testimony in regard to pain sensation is uutrust- 

 worthy when memory is .solely relied upon, and is hardly worth consideiing. 



Finally, I desire to express myobligatiim to Gen. Greely, Chief Signal OHicer, and Mr. Fassig. 

 librarian of the Signal Bureau, for aid in u.se of much valuable manuscriitt, and also t« Prof. Men- 

 denhall. Superintendent Coast Survey, for valued suggestions. 

 S. Mis. 109 3 



