Show forca of cf tile human jaws experiments are reported to have been made by dr black a dentist I 1 of jacksonville fla fia to determine the force exerted by the human J jaws I 1 aws in chewing food and also the greatest force which the jaws are capable of exerting by means of a spring instrument provided with a registering devise he took according to the account given records of about one hundred and fifty bites of daiil different rent pere persons ons fifty of these liping preserved as characteristic te of the ordinary man woman and child the tomal lest pressure recorded was 30 00 pounds by a little girl seven years old with the incisors but using her the same game child exerted a force of 65 pounds the highest record was made by a physician ot of thirty five the instrument used registering in only pounds and he simply closed it together wit without bOllt any apparent effort there being also no method of determining how far above that figure he could have gone and the test was made with the molars several persons exceeded a force of pounds with the incisors and with the molars dr black states that the physical condition of the persons experimented upon seemed to but slightly influence the result and he fie is of the opinion that tile the condition of the membranes is the controlling factor rather than muscular strength and further that in the chewing of food much more force is habitually ex arlett than is necessary essary scie scientific bifi american |