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1928 LIQUID AIR Demonstrations by JOHN SLOAN M. A. DUKE UNIVERSITY A former Science Instructor who is specializing in presenting this program to high school and college students. Eight years have been devoted to research and extensive experimentation with Liquid Air, resulting in many new and spectacular experiments. EXHALING LIQUID AIR More than eighteen hundred demonstrations have been presented in thirty-nine states, three hundred of which have been return engagements Address: John Sloan, Little Mountain, S. C. Driving Nails With Frozen Banana Dewar Flask Containing 2 Lbs. of Liquid Air Mercury Hammer Same Wandeis of LIQUID AIR Liquid air has a pale blue color, weighs almost as much as water and has a low temperature of 312 degrees F. below zero! It is liquefied by subjecting air like we breathe to a high pressure and then lowering its temperature. It is possible to perform a number of strange and fascinating experiments with liquid air as ordinary materials manifest peculiar properties when cooled to this low temperature. For example, if a rubber ball is immersed in liquid air and dropped on the floor, it breaks into many pieces as if made of glass. In the same way a piece of meat, grapes, or any substance containing water becomes as hard as iron and very brittle. Liquid air will freeze a banana so hard it can be used to drive nails into a plank. Even alcohol, a liquid which was once thought impossible to congeal, freezes solid in liquid air. Other novel experiments: Frying egg on ice, lead bell, kerosene candle. Liquid air expands approximately 850 times its volume when it changes into a gas. Several experiments serve to illustrate its expansive force. If a toy balloon is connected to a test tube of liquid air it will be quickly inflated, or if some is poured into a steam engine it will run at a high rate of speed. The nitrogen in liquid air is more volatile than the other gases and evaporates first, leaving practically pure liquid oxygen. By taking advantage of this fact many spectacular combustion experiments can be performed. Steel wire burns fiercely in this liquid and fuses into small pellets; which means that an operation requiring 3000 degrees Fahrenheit has been accomplished in a liquid more than 300 degrees below zero! When aluminum powder is mixed with this liquid and ignited it will burn with dazzling brilliance, producing such an intense heat that even the iron dish will be burned. Many other experiments with liquid air will be performed in addition to those mentioned above, all of which will surprise, amuse and amaze you! Liquid Air Boils on Ice Soap Bubble Freezes When Held Above Liquid Air Test Tube of Evaporating Air Plays Clarinet Explosive properties of liquid air demonstrated by shooting gun A LEAD SPRING Liquid air will cause lead to become like steel LABORATORY EQUIPMENT USED IN PRESENTING LIQUID AIR DEMONSTRATION. LIQUID AIR IS TRANSPORTED IN THE HIGH-VACUUM CONTAINERS. Comments from High School Principals CENTRAL HIGH SCHOOL Syracuse, New York More than two thousand of our students were entertained and instructed by this spectacular program. I wouldn't hesitate to recommend Mr. Sloan's Liquid Air demonstrations to anyone. DIRECTOR OF SCIENCE CLASSEN HIGH SCHOOL Oklahoma City, Oklahoma I have seen numerous scientific demonstrations but none more entertaining and educational than the one you favored us. ROBERT E. LEE HIGH SCHOOL Jacksonville, Florida We booked Mr. Sloan for the second time as his Liquid Air program was one of the best educational entertainments we have ever had in our school. OLEY JUNIOR HIGH SCHOOL Huntington, West Virginia A very unique program. Highly entertaining and instructive. PITTSFIELD HIGH SCHOOL Pittsfield, Massachusetts Today Mr. Sloan presented his program to more than 2500 enthusiastic students. The demonstrations were so entertaining and instructive that they can be recommended to any school. The following are a few of the Colleges and Universities where the demonstrations have been enthusiastically received: Arkansas Teachers' College Clemson College Connecticut State University Teachers' Colleges of Pennsylvania (4) Emory University Vanderbilt University Georgia State College for Women Randolph-Macon Woman's College University of Miami Fairmont (W. Va.) Teachers' College University of Richmond University of Mississippi Louisiana Tech. Winthrop, The South Carolina Woman's College Keene (N. H.) Normal School Connecticut Teachers' College University of South Carolina University of Florida Hamden-Sydney Radford, Va., State Teachers' College Middlebury College Baylor University Southwest Texas State Teachers' College University of Georgia Kansas State Teachers' College Furman University West Virginia Wesleyan University Southwestern University Georgia Tech Westminster College North Texas State Teachers College This Program has been presented in Schools of the following cities: Allentown, Pa. Ann Arbor, Mich. Amarillo, Texas Amsterdam, N. Y. Atlanta, Ga. Augusta, Ga. Augusta, Maine Austin, Texas Barre, Vt. Birmingham, Ala. Bridgeport, Conn. Canton, Ohio Clarksburg, W. Va. Charleston, W. Va. Charlotte, N. C. Claremore, Okla. Claremont, N. H. Cincinnati, Ohio Cleveland, Ohio Columbia, S. C. Columbus, Ohio Corpus Christi, Texas Crowley, La. Cumberland, Md. Dover, N. H. Des Moines, Iowa Easton, Pa. Elgin, Ill. Englewood, N. J. Fairmont, W. Va. Flint, Mich. Fort Wayne, Ind. Grand Rapids, Mich. Great Bend, Kan. Hartford, Conn. Harlan, Ky. Hagerstown, Md. High Point, N. C. Hot Springs, Ark. Houston, Texas Jackson, Miss. Jacksonville, Fla. Joliet, Ill. Keokuk, Iowa Lansing, Mich. Luverne, Minn. Little Rock, Ark. Lynchburg, Va. Mansfield, Ohio Madison, Wis. Manhattan, Kan. Milwaukee, Wis. Montgomery, Ala. Meridian, Miss. Montpelier, Vt. Nashville, Tenn. Northampton, Mass. New Haven, Conn. New Port News, Va. Newark, Ohio New Rochelle, N. Y. Oklahoma City, Okla. Ottumwa, Iowa Pawtucket, R. I. Peoria, Ill. Port Arthur, Texas Poplar Bluff, Mo. Portland, Me. Pittsfield, Mass. Paterson, N. J. Providence, R. I. Raleigh, N. C. Rockford, Ill. Rochester, N. Y. Rockville Centre, N. Y. Rutland, Vt. Roanoke, Va. Santa Fe, N. M. San Antonia, Texas Saginaw, Mich. Sioux Falls, S. D. South Bend, Ind. Scranton, Pa. Sterling, Colo. St. Joseph, Mo. Sidney, Nebr. Syracuse, N. Y. Tuscaloosa, Ala. Toledo, Ohio Troy, N. Y. Utica, N. Y. White Plains, N. Y. Wichita Falls, Texas Wilkes Barre, Pa. Wilmington, Del. Winston-Salem, N. C. Valley Stream, L. I., N. Y. Yonkers, N. Y. York, Pa.
|Title||Liquid air demonstrations: by John Sloan|
|Topical Subject (LCSH)||
|Personal Name Subject||Sloan, John|
|Digital Collection||Traveling Culture: Circuit Chautauqua in the Twentieth Century|
|Contributing Institution||University of Iowa. Libraries. Special Collections Dept.|
|Archival Collection||Redpath Chautauqua Collection|
|Rights Management||Educational use only, no other permissions given. U.S. and international copyright laws may protect this digital image. Commercial use or distribution of the image is not permitted without prior permission of the copyright holder.|
|Contact Information||Contact the Special Collections Dept. at The University of Iowa Libraries: http://www.lib.uiowa.edu/spec-coll/contact/index/|
|Number of Pages||4|
|Digitization Specifications||Scanned at 600 dpi, 32-bit color. Master image available in tiff format.|