37° 
Polarization  by  Mixtures. 
/Am.  Jour.  Pharm. 
1      August,  1901. 
TABLE  II. 
No.  of 
Tube. 
Readings. 
Mean. 
Corrected 
for  Zero 
Error. 
i 
o'9° 
OS" 
o-8° 
0-9° 
o-8° 
o-8° 
o-8° 
o-8° 
o-8° 
07° 
o-8i° 
0*35° 
2 
I.O 
i'i 
IO 
ro 
o*9 
i*.i 
ro  j 
I  '0 
1  0 
i-i 
1 -03 
°'57 
1*2 
I'i 
i*3 
i'i 
1*4 
1*3 
1*2 
r*i 
i'i 
1*22 
076 
r6 
r6 
i*5 
1*3 
i*4 
i*4 
1*5  j 
1*5 
1*2 
1 '4 
1 '44 
0  98 
c 
o 
i'9 
1-8 
1.5 
r8 
1*7 
17 
r6 
r6 
1*9 
1-6 
r;2 
1-26 
6 
2-8 
2-6 
2-8 
28 
2-6 
2*6 
2*7 
2-9 
27 
2-8 
2  73 
2*27 
3'9 
3-8 
4'° 
4-0 
3-8 
4'o 
4"i  : 
4'o 
40 
3-8 
3  94 
3  48 
8 
4*7 
47 
47 
47 
4*7 
.  .0 
4  0 
4  0 
4*9 
4  8 
47 
475 
4'29 
9 
57 
5*9 
5*8 
6-o 
5-8 
5-8 
5*8  1 
5*8 
5*7 
5*7 
5-80 
5  "34 
IO 
7*° 
6-9 
7-o 
7"? 
6*9 
6-9  | 
7'o 
7*1 
69 
6  93 
6"52 
II 
r 
S'o 
7*9 
8-o 
8-o 
8-3 
8-o 
S-o 
8-2 
8-i 
8  2 
8-07 
7-6i 
12 
9*4 
9*3 
9-2 
9*5 
9'3 
9  2 
9*3  j 
9-2 
9*6 
9 '4 
9  34 
8-88 
13 
i°"5 
lo-5 
io-4 
107 
10-5 
io-6 
10-5 
io-5 
10  6 
io'5 
io-53 
1007 
14 
ii-6 
ii*7 
II  7 
n-6 
ii'7 
ii'7 
117 
117 
11  6 
"•5 
1 1 '65 
15 
12-6 
I2'6 
I2-5 
12-6 
12-8 
T2-6 
12-6  ' 
127 
12-4 
126 
i2'6o 
I2'I4 
16 
i3'5 
*3*5 
I3'4 
13*4 
137 
137 
13-3 
I3"4 
1 3  "4 
13  50 
13  "04 
The  curve  which  was  obtained  by  plotting  the  tube-lengths  and 
rotations  as  coordinates  is  shown  below.  It  is  so  close  an  approxi- 
mation to  a  straight  line  that  the  accuracy  of  the  methods  employed 
in  the  subsequent  work  may  be  regarded  as  established.   (See  Fig.  3.) 
Fig.  2. — The  double  tube. 
The  next  part  of  the  work  consisted  in  determining  whether  two 
rotating  liquids  in  tubes  placed  end  to  end  will  produce  an  effect 
equal  to  the  sum  of  the  rotations  of  each  liquid  separately.  For 
the  sugar  solutions  a  double  tube  was  constructed  as  represented 
in  the  figure.    (See  Fig.  2.) 
