largest human calorimeter under construction BELTSVILLE, Md. - The mystery of why some people get fat while others do not on similar amounts of food and exercise may be solved by a new live-in calorie counter being built here by U.S. Department of Agriculture scientists. W Wickes Lumber youb oHy^JJwDSMC fISTEEL ROOFING & SIDING 36" actual coverage Galvanized finish is corrosion and weather-resistant Lengths available to most of your farm construction 9.55 Galvanized 12.90 White 11.48 Red 11.48 Brown 11.48 Tan Custom length special order steel also available in galvanized, white red, tan brown, gold blue, avocado & black (Approx 3 week Del Special order prices slightly higher) rtilglll Piillillimimniimiimi 1 H mini tniiti mill' | I : ii lliillm *l46s°° Jjiiftji s s9Bo°° *3soo°° THE LINCOLNSHIRE 48'x 48' Machinery Storage Building • 14' sidawail • Optional • ft • 24' and door additions s 6977°1 dewall 10' end door 900 Package THE REMINGTON 36 x 40' Multi-Purpose Building • 12’ sidewall • 16' and door Package THE BUCKINGHAM 32x32' Horse Bam • 12' tidawtll • S stall! Lancaster Farming, Saturday, June 2,1984—81 S 24’ 22' *41.19 *44.39 • Optional 811 additions • Optional 6 ft additions Li ti i i * Liquid Manure Pumps 'll I I 1 1 • ELECTROMIX w '“ r w l - l “ r • Barn Cleaner Chains ||£ AGRI UO SYSTEMS 800-222-2948 1301-398-2948) local calorimetry to measure energy produced by metabolizing food in the human body. Sensors in the walls and in the air flowing out of the calorimeter will provide the direct measurements of heat given off through the skin of the person inside. Indirect calorimetry will measure the normal decrease in oxygen and increase in carbon dioxide in the air caused by breathing, and the amount of urea in waste products. Bodwell says measurements will then be used to calculate the amount of food or body tissue used to produce heat. Ideally, he says, the direct and indirect methods should agree closely. To gather all this data, a sleek, gray computer will continuously monitor over 16,000 temperature sensors imbedded in the interior walls of the calorimeter. Another instrument under the computer’s control, a mass spectrometer, will constantly compare the per centages of oxygen, nitrogen and carbon dioxide in the air entering the chamber and in the air coming out. On the outside, the calorimeter may resemble a refrigerator, but it’s rather homelike on the inside, Bodwell says. The unit is com fortably heated and well lighted. A volunteer may bring along books, magazines and similar material. But researchers won’t permit television sets inside because of the heat they produce. Bodwell says clothing and fur nishings in the chamber have to be lightweight to avoid blocking heat radiating from a person’s skin. According to Bodwell, detecting the heat given off by an individual will pose no problem to the chamber’s sensitive equipment. Designed to measure tem perature changes in the air of as little as one thousandth of a degree, the calorimeter will easily monitor the 1,600 to 2,400 calories per day an average size adult expends. That amount of heat can bring 90-135 cups of water to a boil. Volunteers will stay in the chamber from two days to two weeks depending on what foods and exercise patterns researchers are studying. Living conditions in the chamber will be as close to normal as possible, Bodwell says. Toy making workshop scheduled CHESTER COUNTY - Would you like to make inexpensive educational toys for your children? The Penn State Cooperative Exten sion Service of Chester County is sponsoring a workshop for people who would like to make toys for children ages two through six years. You will make a toy to take home and leam about many more toys to make at home. If you have made a toy for your child, please bring it along to share with others. The workshop will be held Monday, June 4th from 7 to 9 p.m. at the Chester County Cooperative Extension Service, 235 W. Market Street, West Chester. Call 696-3500 to reserve a spot. Preregistration is requested. A small fee is required. • Bedding Choppers • Silage Carts • Manure Tanks UIIG Available From GRAHAM’S DAIRY SUPPLY 412-8344162