…It is an optical machine for sexing newborn poultry chicks, invented by Takeo Kizawa in 1950. The principle is to observe and distinguish the difference in the shape of the chick's reproductive glands through the intestinal wall using a curved glass tube inserted into the rectum. In addition to chickens, several types have been made for various poultry such as bantams, turkeys, and ducks. … *Some of the terminology explanations that mention "Kizawa Takeo" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…家禽(かきん)の初生雛の雌雄を鑑別するための光学機械で,1950年木沢武夫によって発明された。原理は雛の生殖腺の形の差を,直腸に挿入したガラスの曲管によって腸壁を通して観察し鑑別するもので,ニワトリ用のほかチャボ,シチメンチョウ,アヒルなど各種の家禽用に数種類製作されている。… ※「木沢武夫」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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