Am.  Jour.  Pharm. 
Dec,  1876. 
V arieties. 
565 
some  cases,  as  decorations  and  lances,  they  must  burn  slowly,  in  other  cases,  as 
■wheels,  stars  or  rockets  and  Roman  candles,  they  must  burn  quicker.  Working 
for  some  months  with  many  compositions  of  such  kind,  I  prepared  three  tables  of 
colored  fires  (red,  green  and  violet),  where  every  formula  with  a  higher  number 
burns  quicker  than  a  fire  with  a  lower  number.  For  instance,  No.  5  burns  quicker 
than  No.  6  and  slower  than  No.  4.  These  tables  will,  I  think,  be  of  much  assist- 
ance in  the  preparation  of  fireworks. 
Green-colored  Fires. 
Potassium 
Chlorate. 
Per  cent. 
Barium 
Nitrate. 
Per  cent. 
Sulphur. 
Per  cent. 
Red-colored  Fires. 
No 
I. 
36 
40 
24 
T> 
40 
39 
18 
3 
29 
48 
23 
2. 
32 
46 
19 
2 
3- 
24 
53 
23 
3- 
27 
5i 
20 
2 
4. 
21 
57 
22 
4- 
23 
55 
20 
2 
5* 
18 
60 
22 
5- 
20 
58 
20*5 
I*5 
/: 
0 . 
16 
62 
22 
6. 
18 
60 
21 
1 
7- 
14 
64 
22 
7- 
16 
6l'6  21*2 
1*2 
it 
!3 
66 
2 1 
8. 
J5 
63 
21 
1 
9- 
12 
67 
2 1 
9. 
13 
64 
22 
1 
S  O. 
11 
68 
21 
10. 
12 
65 
22 
£  I. 
10 
69 
21 
1 1 
66 
22 
I 
12. 
9'5 
69-5 
21 
12. 
10 
67 
22 
*3- 
9 
70 
21 
n- 
10 
67*25  22 
075 
44. 
8-5 
7°'5 
21 
14. 
9'*5 
68 
22 
0  75 
35. 
8 
7i 
21 
!5- 
9 
68. 
35  22 
O.65 
Violet-colored  Fires. 
Violet-colored  Fires. 
^0. 
Potassium    Calcium  Malachite, 
Chlorate.  Carbonate,  powdered. 
Percent.   Percent.  Percent. 
Sulphur. 
Per  cent. 
Potassium  Calcium 
No.  Chlorate.  Cerbonate. 
Per  cent.   Per  cent. 
Malachite, 
powdered. 
Per  cent. 
Sulphur. 
Per  cent. 
52  29 
4 
15 
9- 
51 
16 
18 
15 
2. 
52  28 
5 
15 
10. 
51 
15 
19 
15 
3- 
52  26 
7 
I5 
51 
13 
21 
15 
4- 
52  24 
9 
J5 
12. 
5i 
1 1 
23 
'5 
5- 
52  23 
10 
15 
13. 
5i 
10 
24 
J5 
6. 
52  21 
13 
15 
14 
5i 
8 
26 
r5 
7- 
51  20 
5I  18 
14 
16 
J5 
15 
5i 
6 
28 
*5 
Potassium 
Cholorate. 
Per  cent. 
Strontium 
Nitrate. 
Per  cent. 
Percent.  perC6nt. 
Chem.  News,  Sept.  29,  1876. 
The  Physical  Properties  of  Gallium. — M.  Lecoq  de  Boisbaudran,  in  a 
recent  note  to  the  French  Academy  of  Science,  states  that  he  has  prepared  about  7^ 
grains  of  gallium.  In  liquid  state,  the  metal  is  a  beautiful  silvery  white ;  but  in 
crystallizing  it  turns  blue,  and  its  brilliancy  becomes  greatly  diminished.  The 
point  of  fusion  is  fixed,  for  the  metal  melts  very  slowly  at  86*27°  Fah.,  and  crystal- 
