@article{oai:nagoya.repo.nii.ac.jp:00019604,
 author = {岩井, 章 and 田中, 津太雄 and IWAI, Akira and TANAKA, Tsutao},
 issue = {2},
 journal = {空電研究所報告},
 month = {Mar},
 note = {For several years, we have observed the directions of arrival of atmospherics at three stations. Cathode ray direction finders of instantaneous type with photographic recorders were employed. The films recorded were magnified by a projector and readings of direction were taken approximately within 0.5 degrees by a protractor. Origins of atmospherics were determined on a Gnomonic chart by triangulation based upon observed directions of arrival. This process has compelled us to make great efforts. In order to reduce this trouble, we devised a new apparatus in which the origin of atmospherics is semi-automatically located on a fluorescent screen of a cathode ray tube and the error in triangulation is easily found and can be compensated. This apparatus is at present under construction. Details will be reported in the next paper.},
 pages = {118--124},
 title = {空電方位整理装置},
 volume = {4},
 year = {1954}
}