and Terrestrial Radiation. 



513 



hitherto had only been demonstrated by your own important ex- 

 periments (as far as my knowledge on this point goes). 



You would oblige me exceedingly by giving me your ideas on 

 the various points raised in this letter. According to your 

 opinion, I purpose either turning the results to account by pub- 

 lishing them in my next publication, or hand them over to you 

 with no other condition but that I shall be supplied with what- 

 ever you shall write upon this special subject. 



Requesting you kindly to excuse the liberty I have taken in 

 thus troubling you, j winvin$ my dea r Sir, 



Yours very truly, 

 Table I. G - Neumayer. 



No. 

 of 



obs. 



Mean 



No. 



Mean 



No. 



Mean 



1 



Temp. 







Temp. 







Temp. 



Pressure 





of air 



of 



Pressure 





of air 



of 



Pressure 





of air 



of 



Temp. 



minus 



obs. 



of 



Temp. 



minus 



obs. 



of 



Temp. 



minus 





vapour. 



of air. 



temp, 

 radia- 

 tion. 





vapour. 



of air. 



temp, 

 radia- 

 tion. 





vapour. 



of air. 



temp, 

 radia- 

 tion. 





inch. 









inch. 



o 







inch. 







4 



01712 



321 



f-35 



29 



0-2703 



55-1 



3°-56 



45 



0-3483 



64-8 



4°03 



43 



•1929 



377 



2-73 



44 



•2704 



501 



3-82 



44 



•3485 



56-3 



3-37 



10 



•1956 



46-9 



3-38 



44 



•2869 



54-7 



3-74 



48 



•3493 



650 



3-17 



42 



•2100 



399 



2-62 



41 



•2878 



56-4 



3-73 



45 



•3497 



66-9 



3-93 



34 



•2114 



45-3 



2-88 



43 



•2879 



540 



4-31 



49 



•3677 



58-7 



3-24 



43 



•2120 



46-4 



2-88 



41 



•2884 



56-8 



400 



45 



•3680 



70-2 



3-55 



44 



•2133 



49-5 



3-52 



43 



•2886 



52-7 



339 



44 



•3687 



64-5 



3-72 



45 



•2293 



43-2 



2-98 



43 



•2888 



52-5 



385 



48 



•3687 



63-4 



3-23 



40 



•2302 



43-6 



3-34 



45 



•2892 



59-6 



3-56 



24 



•3692 



630 



3-69 



40 



•2304 



46-2 



3-10 



40 



•2894 



572 



400 



44 



•3692 



64-4 



4-34 



43 



•2307 



45-4 



3-23 



45 



•2899 



50-7 



313 



43 



•3701 



60-5 



3-52 



43 



•2307 



51-3 



4-60 



40 



•2900 



56-5 



3-91 



44 



•3876 



66-3 



4-50 



44 



•2313 



52-9 



2-69 



49 



•2915 



53-3 



3-97 



49 



•3888 



618 



360 



29 



•2322 



52-6 



3-51 



45 



•2940 



61-9 



370 



43 



•3894 



632 



376 



44 



•2484 



473 



337 



44 



•3076 



530 



3-21 



45 



•3900 



692 



3-77 



44 



•2493 



46-5 



2-81 



40 



•3080 



611 



4-58 



19 



•3909 



59-0 



3-32 



43 



•2494 



471 



3-32 



40 



•3088 



575 



338 



44 



•4081 



65-9 



3-84 



41 



•2496 



526 



3-41 



43 



•3091 



576 



3-95 



49 



•4087 



63-5 



3-60 



44 



•2497 



48-2 



2-32 



43 



•3093 



581 



4-10 



43 



•4092 



62-3 



400 



43 



•2497 



494 



360 



44 



•3095 



54-2 



3-83 



3 



•4100 



64-4 



3-07 



43 



•2502 



54-9 



3-60 



24 



•3095 



55-9 



418 



48 



■4280 



681 



424 



45 



•2504 



463 



4-52 



44 



•3096 



55 



3-95 



9 



•4290 



640 



3-29 



40 



•2510 



59-8 



4-12 



45 



•3097 



64-4 



3-47 



49 



•4295 



671 



413 



40 



•2512 



48-2 



3-09 



44 



•3111 



577 



3-82 



32 



•4360 



675 



3-56 



6 



•2533 



54-9 



310 



4 



•3232 



551 



3-30 



35 



•4476 



66-7 



3-77 



41 



•2523 



52-1 



3-53 



44 



•3280 



57-7 



403 



48 



•4497 



69-2 



4-25 



43 



•2683 



48-5 



3-51 



48 



•3286 



55-5 



382 



48 



•4692 



70-6 



3-66 



45 



•2687 



52-7 



3-71 



43 



•3287 



59-1 



3-80 



26 



•4698 



71-7 



3-84 



44 



•2687 



50-2 



360 



41 



•3290 



59-4 



390 



3 



•4886 



68-7 



2-86 



40 



•2688 



56-3 



405 



44 



•3291 



55-2 



3-90 



48 



•4893 



73-6 



304 



44 



•2689 



50-2 



358 



45 



•3294 



59-3 



364 



48 



•5096 



731 



347 



41 



•2691 



56-4 



3-74 



40 



•3298 



66-7 



4-33 



27 



•5284 



76-8 



3-58 



44 



•2692 



477 



3-58 



40 



•3320 



68-8 



368 



12 



•5460 



770 



455 



43 



•2694 



50-3 



3-98 



43 



•3468 



62-1 



3-85 



12 



•5715 



79-4 



3-50 



43 



•2695 



518 



255 



49 



1 -3472 



56-3 



3-48 



19 



•5908 



77-9 



372 



40 



•2696! 64-S 



410 



44 



i -3478 



600 



4 23 



13 



•6061 72-5 



2-58 



43 



i 



•2699! 53-2 



3-54 



34 



1 



! -3481 



610 



4-41 



4 



•6292 ( 78-3 



2-23 



