No. 
Co oH Oo On +, WO YP — 
— et 
oo) SS 
ie) 
14 
26 
Metal 
Iron wire (%) 
Zinc wire (e) 
” 
” 
Zinc leaf (A) 
Lead leaf (£) 
Copper gauze (h) 
” 
Nickel wool (A) 
Aluminium (A) leaf 
id. shiny amalg. 
27 Silver wire (2) 
(e) = electric conduction, is nearly pure. 
(A) = commercial quality. 
(£) = so-called tea lead. 
6, 
1451 
Acid 
alcoh. HCI 
” 
acetic acid 
formic acid 
acetic acid 
” 
alcoh. acetic acid 
alcoh. HCI 
acetic acid 
acetic acid in acetic 
acid anhydr. 
alcoh. acetic acid 
formic acid 
” 
oleic acid in tur- 
pentine 
lauric acid in para- 
fin oil 
alcoh. HCI 
acetic acid 
formic acid 
sol. potassium in 
90 0/9 alcohol 
HCl 
KCN 
HCI 
HCI 
alcoh. 
alcoh. 
alcoh. 
alcoh. 
alcoh. acetic acid 
alcoh. NaCN 
Decrease | 
blank 
| < 1000 
280 
in 40 min. 
0 
in 40 min. 
13 
| in 180 min. 
in 20 min. 
0 
in 20 min. 
230 
50 
250 
50 
4 
(f) 
(3) 
Decrease 
nitrob. 
790 
720 
200 
180 
135 
120 
470 
920 
490 
50 
1800 
in 3 min. 
1150 
in 10 min. 
3080 
in 4 min. 
460 
| 1070 
in 10 min. 
690 
in 3 min. 
470 
in 10 min. 
560 
1910 
1330 
144 
125 
1450 
132 
pure. 
> 1000 | 
| 
Decrease | Original 
Benzald. | weight 
>< 1000 | in gr. 
90 1.98 
90 1.98 
100 1.98 
10 1.97 
0 1.68 
40 1.86 
640 | We (7e 
50 Wel 
— 1.39 
50 1252 
50 1.80 
in 40 min. 
40 bats 
in 40 min. 
13 3.08 
in 180 min. 
0 1.39 
10 | 2.13 
320 tS 
0 2.07 
170 1.07 
in 50 min. 
6 0.69 
in 20 min. 
0 0.47 
in 20 min. 
— 0.67 
== 3.04 
480 ZOET 
— 0.441 
110 0.985 
— 1.45 
— 0.152 
To 50 cc. of acid was added 10 cc. of nitrobenzene, resp. benzaldehyde. 
Time in 
min. 
240 
120 
20 
120 
tin foil contains a trace of lead. 
