Stevens Institute of Technology - Link Yearbook (Hoboken, NJ)

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SE. 1 lg, la' E. g, I l L ii , iii 1 I if K' 1 ij l. i. f' , li F 1 3 1 'i i Q. ,F . E il ,ETSI 5 if ff ,i vi 1' . 3 I ff' xx- ' 51, ' ,. ?f i Iron by Direct Current in Street Soil, and Electrolysis from Stray Electric Currents. Before entering Stevens he obtained a great deal of practical electrical knowledge in the shape of the electrical works of Bergmann 8a Company, New York City, and in the General Electric of Company Schenectady. Upon grad- uating he was made instructor in applied electricity at Stevens, and later became pro- fessor. It is mainly due to his study and edorts to make improvements that the course in electricity kept pace with the times and that so many Stevens graduates have been fitted to hold responsible positions in the field of electricity. Nothing is more conducive to good health and comfort than proper heating and ventilation. Knowing this and recognizing the necessity for replacing the obsolete systems of heating and ventilation then in use in the large buildings which were just beginning to play an important part- in the growth of our larger cities, Alfred R. Wolff, '76 Cdeceased, 19095 began the study of the problem in 1880. So well did he perform his work that he was continuously receiving commissions from former clients whenever any important building operation was being contemplated. His field of activities was very extensive, covering the heating, cooling and venti- lating of office buildings, banks, churches, schools, public libraries, clubs, hotels, hospitals, stores and residences. Perhaps a short list of the buildings that he equipped with heating, cooling and Ventilating plants, will give a clearer idea of the importance of the work he did. Among these structures are :-St. Patrick's Cathedral, New York, Morton Laboratory of Chemistry, here at Stevens, The Hall of Records, New York, Metropolitan Building, New York, Symphony Hall, Boston, Gimbel Brothers, Philadelphia, Bellevue Hospital, New York, Bank of Montreal, Montreal, Stock Exchange, New York, Plaza Hotel, New York, and the Public Library, New York. In view of the present widespread interest in the wireless telephone, it seems opportune to speak of the part Stevens graduates have played in the development of the telegraphic sciences. The patents of Frederick King Vreeland CM. E. '95, Sc. D. 'QU in the field of radio telegraphy include the electrolytic detector, the widely used beats receiver for continuous waves, and a variety of minor devices. He is now doing research work, devoting himself largely to the elimination of interference by foreign signals, and atmospheric strays. His sine-wave oscillat- or developed in 1904 was the first regenerative electrical oscillator. He later de- veloped a system of multiplex telegraphy with alternating currents which was dem- onstrated in 1909 over a 250 mile line with twelve complete sending and receiving sets operating over the same wire. He has taken out over twenty-five patents of which those relating to the oscillator have been purchased by the General Electric 1-'. K. VREELANDS. 10 ZEZE

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'H IEQ 2 2 ,gs other lines. In proof of this statement, a numberof 1 specific examples will be given. As is inevitable in an article of this nature, the names of many men of accom- plishment must be omitted, not because of a lack of appreciation but on account of' the extent of the field to be covered in the limited available space. One of the most striking figures in the history of the development of the illuminating gas industry in this country is Dr. Alexander C. Humphreys, President of Stevens, consulting engineer, administrator and educator. While pursuing the course of studies here, he was super- intendent of the Bayonne 81. Greenville Gas Light Com- pany and was married and maintaining his home. Although he was able to attend lectures at the DR.A.,.-,,m,l,,mEYS Institute only two mornings a week, he completed the course in the prescribed four years, being graduated with high honors in 1881. During the next twenty years he rose to the highest place in the gas making indus- try of this country, becoming in turn Chief Engineer of the Pintsch Lighting Com- pany, New York, General Superintendent and Chief Engineer of the United Gas Improvement Company, Philadelphia, Senior Member of the firm Humphreys 8: Glasgow, London and New York, President of Humphreys th Miller, Inc., New York and President of the Buffalo Gas Company, Buffalo, New York. In 1902 Dr. Humphreys was unanimously chosen to succeed Dr. Henry Morton as President of Stevens and he has since ably filled the position, his administra- tion being marked by the same energy, high character and ability which carried him to his earlier achievements. I-Ie has received, altogether, honorary degrees from eight colleges, and has risen in the estimation of his fellow countrymen to the extent of being called upon to serve as President of the American Society of Mc- chanical Engineers, The Engineers' Club, The American Gas Institute, and the International Gas Congress. Early in 1891, John F. Kelly CPh. D. '78j, recognized as one of the foremost electrical engineers of the world, pointed out the detrimental effects of lagging currents .on alternating-current power and lighting circuits, and in the following year he showed how to overcome these effects. He was probably the first to suc- ceed in shaping scientifically the poles of alternators to obtain a predetermined e. m. f'. wave. He has always advocated the employment of high voltages in trans- mission work and has designed power plants on this principle. Mr. Kelly has re- ceived over ninety U. S. patents covering apparatus for generating, transmitting, distributing and measuring electricity. He is President, Telelectric Company, Pittsfield, Mass., and a Fellow of the American Institute of Electrical Engineers. Prof. Albert Frederick Ganz, '95 Cdeceased, 19172, was a national authority on the subject of methods for lessening corrosion of underground structures by electrolysis. He contributed many valuable scientific papers to technical societies and journals, among these being the theory of Electrolytic Corrosion, Notes on the Protection of Underground Pipes from Electrolysisg Electrolytic Corrosion of 9 Fl ll I

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1 l Co. and the Radio Corporation, while his multiplex telegraphy patents have been re- cently acquired by the American Telephone 8: Telegraph Company. Mr. Vreeland has also done exploration work in the Canadian Northwest, has collected specimens for tl1e National Museum and the New York Botan- nical Gardens, and is a member of the Com- mittee on Conservation of the Camp Fire Club of America. Another earnest and talented worker in the field of radio communication is Professor Louis Alan Hazeltine, '06, Head of the Department of Electrical Engineering here at Stevens. His radio work has included research and development, and services as expert in patent cases. His private researches have been in connection with the thermionic bulb, which has become a powerful factor as in radio communication. The results of his research along this line are embodied in a paper entitled Oscillating Audion Circuits. general mathematical discussion of the theory of the thermionic oscillator which appeared in the English language. He has also published other papers on sub- jects relating to radio work, and has several patents pending in connection with radio communication. In addition to his radio work and teaching duties Pro- fessor Hazeltine has done consulting engineering work on the problem of lessening corrosion of underground structures by stray currents. During the war Professor Hazeltine organized Radio and Buzzer classes for men desiring to enter the Signal Corps, while from May to September, 1918, he gave continuous service in the radio laboratory at the U. S. Navy Yard in Washington, and until July, 1919, continued in a consulting capacity. Early in February of this year, Professor Hazel- tine was asked by Secretary of Commerce, Hoover, to be a member of a conference for the control and development of radio telephony. Of special interest in this connection is the fact that Professor Hazeltine was one of the four civilian members, six government officials com- pleting the membership of the conference. - Railroad development has occupied the attention of a number of Stevens Alunmi. 11 L. A. IIAZELTINE This paper contained the first cronos Gruns' ZE2