If pain is felt in any part when pressure is made upon it the heightened sensibility is called TENDERNESS, the part is said to be tender. A part may be both painful and tender, as it usually is if the pain continue for a time; it may be tender without being painful as it is usually, if pain continued for a time and then ceased. Itching is an uneasy sensation allied to pain. It often affects the natural outlets of the body. It occurs about the rectum from the motions of little worms that nestle there, and other causes; and this itching of the rectum, and likewise of the pudendum, are distressing complaints, harassing the patient continually, preventing sleep and requiring medical treatment (F. 195). The tingling and pricking often felt in the windpipe, and provoking coughing, has some analogy to itching. NAUSEA is sometimes a direct symptom of gastric disorder, at other times it is a very important indirect result of disease at some distance from the stomach. The nausea which is so troublesome to pregnant women, is an instance of a morbid sensation, sympathetic of irritation in a distant organ. DIZZINESS or vertigo results sometimes from disease within the head, and sometimes it is the indirect result of disease of the stomach or of mere debility. A sensation of sinking, sensations of weight and lightness, of drowsiness, tenesmus, strangury, heartburn, and various conditions of the special senses are mostly SUBJECTIVE SYMPTOMS. One of the first symptoms of diabetis is a preternatural keenness of appetite, but in most diseases the appetite is lost or impaired or perverted. THIRST is generally great in diabetis, and there is commonly considerable thirst in inflammatory complaints. The above named symptoms are mostly subjective, but are accompanied by others that are objective, that show that the functions of certain parts are disturbed or suspended; and it is of especial importance to notice the PULSE, as this is a valuable guide in treating disease. Each contraction of the heart sends out a wave which distends the blood vessels, and they by their contractility or elasticity carry it on through the entire arterial system. This periodical distention is the pulse. The PULSE BEATS can be felt wherever an artery approaches the surface; it is usually taken and counted at the wrist; in children it can be best taken at the temporal artery during sleep. To take the pulse accurately place two or three fingers on the artery making moderate pressure, and note particularly its frequency, its regularity, its forces and its fullness. The RATE varies with varying circumstances. The average number of pulsations in a healthy adult is from 70 to 75, but there are some persons who, when they are quite well have a pulse of 80 or 90 to the minute, and there are others in whom it seldom rises above 60. It is usually more rapid in women than in men, is much more frequent in early life than in old age, and the average rate in a healthy child is 120.