,4
 \t


< ecesay to prevent


which


these


 ^P, rfor instance,
?iiure in the air, and


a fall of 138


probably


r.


same
were


great diurnal


persons
it not f1


a certain


or 140


equally


rangepr te.. of
deprecate. Ina


certain


amount


we should


is 40 in


C


deposit


have


]ry climate


amount


dewy


of 30 or
of Upper


 tggypt

 'afllato
 itade
 fr;imea e
fttozwen


ments


in sandy deserts, as Sahara,


radiation


at night


2 F.; the temperature


move 100 F


00 F.


so that


by night.


unrestricted


ranging


On our Western plains,


the body


In Floric


n this paper, the moisture is


beat during


the day by evaporation,


is almost burn


where the dryness is


, the temperature


during the day in the


the range is some-


ed up by day


, as we have seen by previous state-


just sufficient to temper the


by condensation and


(be checking of radiation to limit' the cold at night.
S.


II
C.


B mmer


heat


is in this


steady prevalence


manner


and with


winds, rendered


the aid of


very


Even


a pretty


tolerable, the


evenings and nights even pleasant.
 Purity of the Air.-In estimating the climatic advantages of


different health resorts, too


.devoted


to what


may be


the common idea of


odors


yet the gases,


. injurious of


little attention


technically


purity has


which


these


Mrial impurities, and


' o'ntration to do barm.


ibn of his time in his laboratory


called


been freedom


has been heretofore


purity of air.


from


odors indicate, are


unpleasant


least


rarely exist in sufficient con-


The chemist spends a considerable por-


surrounded


by various


gaeas


, m,
 II

 i,

 -l.





 I
 .4



 I

 A
 ,
*-*
* 1^







"-I 3


'4,
,.42


$i a far more concentrated


. astmpophere (if


form


we except a few


than


which


they are met with in the


are never found in the


' atmosphere),


and comes out unscathed.


gases


from a sub


uric-acid factory on the


Hudson


river


have destroyed trees


P long distances, and even on


do examining


the opposite bank of


the workmen in the factory


the river,


I could not:


were much


t4 t w


inconvenienced by them after becom-


to .he irritation of the laryugeal mucous
(oMi$ jg which eajros the feptadton of


 B(t rfiyq xiAbove is
afr ttttty,*o t n


t.SSa~w t
$1 ft~ttSa


.7


Si i


F*.


A