@article{oai:soar-ir.repo.nii.ac.jp:00013183,
 author = {小山,  恒夫},
 journal = {信州大学工学部紀要},
 month = {Dec},
 note = {In order to measure the temperature distribution in an oil well and an ocean, the author made an differential electrical thermometer using a semiconductor and an electric hydrobarometer. The thermometer is simple in structure and its accuracy is 5/1000～1/100 ℃ in differential temperature. The semiconductor element is of rod type having the volume of 3×3×4 mm³. The author measured the temperature distribution in water of a tank and liquids of the oil well at Nishiyama oil fields of Teikoku Sekiyu Co. According to these measurements, the temperature distribution in the well gives the data of oil layers and others. The electric hydrobarometer indicates, directly and continuously, the depth by converting the displacement of a Bourdon tube caused by hydropressure to the change of electric resistance. This hydrobarometer can measure the depth of 0～40, 30～800 meters. The temperature distribution in a sea, a river, etc. can also be measured by means of the hydrobarometer in combination with the thermometer. The author measured a temperature-depth characteristic at a dam of 9 meters deep., Article, 信州大学工学部紀要 6: 37-46 (1956)},
 pages = {37--46},
 title = {微小温度差測定器},
 volume = {6},
 year = {1956}
}