1 In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured. 2  Of the many different varieties of mercury barometers, most variations arise from different techniques for measuring the height of the mercury column.
Recognizing the Symptoms of an HIV Rash. 1  1. Check for a rash that is red, slightly raised, and very itchy. 2  2. Note if the rash appears on your shoulders, chest, face, upper body, and hands. 3  3. Pay attention to other symptoms that may occur when you have HIV rash.  4. Be aware of the causes of HIV rash.
Less common HIV symptoms in women in this stage include: Swollen lymph nodes; Nausea; Fatigue; Ulcers in the mouth; Vaginal infections, like yeast infections and bacterial vaginosis; Night sweats; Vomiting; Muscle aches and joint pain; During the acute HIV stage, symptoms most often last one to two weeks. Asymptomatic stage of HIV in women