. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 2 K. MITSUKUBL KU gîass-plate A (Fig. 1) which happened to he semi-circular in shape with the diameter of ahout one foot was placed on a tahle. This was made slightly wet so that the mollusc could easily crawl over it. On this, a glass-vessel B, ahout 10 cm. in diameter and 3 cm. in height was placed and filled with water to the depth of ahout 1 cm. Various articles C, D., P, and G- among which a small dissecting-dish C inverted and tilted up by a small box D was very conspicuous were placed in the quarter toward which the animals
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 2 K. MITSUKUBL KU gîass-plate A (Fig. 1) which happened to he semi-circular in shape with the diameter of ahout one foot was placed on a tahle. This was made slightly wet so that the mollusc could easily crawl over it. On this, a glass-vessel B, ahout 10 cm. in diameter and 3 cm. in height was placed and filled with water to the depth of ahout 1 cm. Various articles C, D., P, and G- among which a small dissecting-dish C inverted and tilted up by a small box D was very conspicuous were placed in the quarter toward which the animals were expected to move. 100 individuals* out of ahout 200 which had previously been used in a similar experiment were pick- ed up at random and placed in the glass-vessel B. Light was shining from the two windows N and E plaeed at a right angle to each other. This was at 2 (Aug 6). Almost immediately in- dividuals started in the direction of the arrow BH which represent- ed the direction of the least light, E climbed over the edge of the glass-vessel Band crept over the glass-plate A in the same direc- tion. Before long the vessel B was nearly empty. At 5 three and half hours after the Fig. 1. commencement of the experi- ment, the individuals were disposed as follows :— Remaining in the dish B 8 At the spot a 1 .. At the spot b 1 At the spot c 6 .. * It is possible that iu earlier experiments there was some mixture of the individuals of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nihon Do?butsu Gakkai; To?kyo? Do?butsu Gakkai. Tokyo : Societas
Size: 1237px × 2020px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
