156 C. M. Warren on a new process 
13°74 46:92 73°44 46°97 
17°79 59°41 69°93 31°50 
32°05 68°73 58°68 16°79 
and by the second method they are 
73°44 46°97 
17°80 59°43 69°93 31°49 
32°08 68°74 58°67 16°79 
showing a maximum difference of only ‘03. 
The equation of = ore of daily temperatures throughout 
the year is by the first method 
yas: Hifies 86 sin (7—104° 41’) &e., 
and by the second method it is 
y= 44-67-4+29°86 sin (r—104° 40’)+ &e. 
Tf it is necessary to choose between the two ee perhaps 
the second may be preferred for reducing temperatures, because 
oocieirical curve admits points of inflexion, which the 
ban annot have; so that the latter can hardly be said to 
represent very well the curve of pupersne in the spring and 
autumn months, where it changes from ex to concave or 
the reverse. Accordingly we see that for St. Paul the differences 
between the monthly means found by the two methods are 
greatest in the spring and autumn months, and null at midsum- 
mer and midwinter. 
May, 1866. 
salina sia 
ArT. XXIV.—On a New Process of Organic Elementary Y sg 
Sor Substances containing Chlorine; by C. M. War 
— bodies containing chlorine—and probably those < 
that contain bromine and iodine—may be analyzed by a pr 
anslogous to that which I have already described for Seinen 
containing sulphur.’ 
in that process, so also in this, the substance is burnt in a 
stream of oxygen gas, in the manner described in my first paper, 
on organic Elementary “Anal 
Similarly, also, as in bo scares of sulphur ayn the 
chlorine i is + absorbed and retained during the combustion, by 4 
i 2 
hydrogen, in either process, are determined from the same por- 
- G iaaaaeaaae the American Academy, March, 1865 ; this Journal, Jan, 1866, 
* Proceedings of the American Acad,, 1864, p. 251; this Journal, xxxviii, 387. 
