486 Proceedings of the Royal Physvwal Society. 
in a hammock slung between two trees; this is far preferable 
to sleeping on the ground. A good deal may be done to 
make a settlement healthy by planting large trees, the 
eucalyptus, ete.; and Martin Clark recommends the planta- 
tion ot bananas in the reclamation of malarious lands. 
With regard to personal hygiene, food should be taken in 
sufficient quantity, and it is a mistake to think that white 
races in the Tropics can exist on native food. They should, 
however, not consume as much animal food as at home. 
Water must be boiled and filtered, and milk also boiled. 
Coffee apparently acts as a prophylactic to some extent. 
Moderate smoking is advisable. Strict temperance must be 
the rule, and persons must protect themselves as far as 
possible from chill, for although chill does not produce 
malaria, it may act as the exciting cause of an attack. The 
night air should be avoided, because then the malaria be- 
comes concentrated, on account of the air cooling more 
rapidly than the earth. 
With regard to the use of drugs, quinine is certainly 
to some extent a prophylactic, and should be taken in doses 
of 3 or 4 gers. daily during, and for fourteen days after, special 
exposure in malarious regions; but I do not think it advisable 
to take the drug continuously, for in my experience the 
system becomes habituated to its use, and, as it will not 
entirely prevent attacks of malaria, larger quantities are 
required to cut short the attacks when they occur. Another 
plan I have found successful is to give 15 grs. of sulphate of 
quinine twice a week for six weeks, and then 3 gers. daily for 
a month. Quinine should not be taken in either tea or 
cotfee, and the drug should not be given in the form of pills. 
The use of lemon juice is very beneficial, and arsenic in 
minute doses may likewise be employed with advantage. 
With regard to the treatment of malaria, I believe Laveran’s 
recommendation to be the best. For the first three days 
administer 12 to 15 gars. of hydrochlorate of quinine daily ; 
_ from the 4th to the 7th days omit the drug; on the 8th, 
9th, and 10th days give 10 or 12 gers. daily; from the ilth 
to the 14th days omit the drug; on the 15th and 16th 
Oo) 
days give the same dose, and again on the -2lst and 
