622 
FACTS AND OBSERVATIONS. 
sient, the dose must be repeated in a lengthened operation. — 
Ibid. 
Milk a Preservative against Lead Poisoning. — 
M. Didierjeau, a red-lead manufacturer, has discovered that 
the use of milk at their meals, which he has made obligatory 
on his workmen to the extent of one litre daily, preserves 
those employed in lead works free from any symptom of lead 
disease. He vouches for the truth and correctness of this 
communication. — Ibid . 
Anaesthetics. — M. Sauer, a surgeon-dentist of Berlin, 
after various experiments, has come to the conclusion that 
the very best of these is a mixture of protoxide of nitrogen, 
chloroform, and atmospheric air, as being free from the 
dangers attending the use of each of the two former alone. 
The proportions he advises and employs are- — Liquid chloro- 
form, 6 grammes; atmospheric air, £ litre; and 16 litres of 
protoxide of nitrogen. — Ibid. 
Chemical Investigation of Condensed Milk. — L. 
Kofler gives the following tables as the result of his re- 
cj Cl 
searches. Each of the samples he has examined also contains 
sugar (purposely added) to an extent of from 25 to 30 per 
cent., and milk sugar to from 14 to 18 per cent. : — 
Anglo- 
Swiss Con- 
densed Milk 
Company 
| Milk from 
| Sassiu 
! (Prussia). 
Milk from 
Vivis 
(Switzer- 
land.) 
Milk from 
Kempton 
(Bavaria). 
Milk pre- 
pared by 
L. Kofler 
himself. 
Water 
22-180 
18-824 
22-421 
18-810 
20-770 
Fatty matter (butter) 
12-260 
12-625 
12-030 
13-650 
12-830 
Caseine and albumine 
28-100 
24-240 
25*960 
24-900 
29-600 
Ash 
2-180 
2-482 
2-673 
2-430 
2-865 
All these articles were submitted to microscopic investigation 
and found to be genuine, fit in every respect, when diluted 
with cold water (in which liquid all these substances were 
readily soluble), to be used as milk. — Ibid. 
Phenyl Ether. — When sulphate of diazobenzol is mixed 
with excess of phenol, nitrogen is evolved, even at the ordi- 
nary temperature of the air, while there is obtained, at the 
same time, a thick, oily fluid, exhibiting an agreeable aromatic 
smell. When this liquid is treated, first with excess of 
caustic soda, and next rectified by distillation with steam, an 
