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HINTS TO TRAVELLERS. 
Chicken-pox . 
Incubation period, a fortnight to three weeks. Rash appears first day. 
Rash .—Pink spots, upon which blebs form after twelve to twenty-four 
hours. The blebs are at first transparent, but subsequently become 
yellowish, and after two to three days shrivel and separate, leaving a 
pink scar. 
The symptoms are usually very mild, perhaps only slight fever, and 
possibly headache. The appearance of the rash is often the first symptom. 
Treatment .—Isolation, and light diet. Bed may not be necessary. 
Diphtheria . 
Diphtheria is an acute infectious disease, the essential feature of which 
is a peculiar inflammation of the lining membrane of the mouth, nose, 
throat, and windpipe, characterised by the formation of a membrane 
upon the inflamed surface. 
Causes .—It may be contracted from some person suffering from the 
disease, or from infected milk, etc. 
As the disease is a very grave one, and skilled treatment is often an 
absolute necessity, measures should be immediately taken to summon 
medical assistance on the first appearance of diphtheria, or the patient 
should be sent as speedily as possible to a place where medical aid is 
likely to be obtained; for if the breathing becomes so difficult that the 
patient gets blue in the face, an operation for opening the windpipe will 
be necessary. 
Incubation period, two to six days or even longer. 
Symptoms. —Headache, discomfort, loss of appetite, sore throat, and 
sickness, with swelling of the glands at the angle of the jaw. On 
examination the palate and tonsils are seen to be swollen, with a white 
deposit of membrane upon the surface. The membrane may be thick 
and tough, and if stripped off will leave numerous small bleeding points. 
The temperature may run up, and is irregular in type. The pulse is 
rapid and feeble, and the bodily strength is quickly lost. 
If the nose be affected there is copious discharge from the nostrils, 
with difficulty of breathing and much discomfort. If the windpipe is 
