By varying the proportions of LiCl and CaCl_{2} the results may be somewhat changed. The characteristic contractions may be obtained with as small a quantity of CaCl_{2} as in a mixture of 50 c.c. m/6 LiCl + ¹⁄₂ c.c. m/6 CaCl_{2}. The movements, however, last only 5-10 minutes and are less active than in a mixture of 50 LiCl + 5 CaCl_{2}. This latter mixture seems to be perhaps the most favorable, although almost equally powerful contractions are obtained with mixtures containing as much as 10 c.c. CaCl_{2} to 50 c.c. LiCl. When more CaCl_{2} than this is added the movements usually appear later and last a much shorter time. With equal parts of LiCl and CaCl_{2} they cease in 15 to 20 minutes, while in a mixture of 5 c.c. LiCl + 50 c.c. CaCl_{2} the movements appear late and last only 4 or 5 minutes. The loops in mixtures with relatively much CaCl_{2} come to rest in the shape characteristic of loops in pure CaCl_{2}. They become shortened and are found to be straightened out at the end of the experiment. Where relatively much LiCl is present the loops remain almost their original length and are usually coiled. This is shown in the following table:-- 50 c.c. Li Cl 50 c.c. CaCl_{2} Time 50 c.c. LiCl + + 50 c.c. CaCl_{2} 5 c.c. CaCl_{2} 5 c.c. LiCl 11:14 Length of loop Length of loop Length of loop Length of loop 10 cm. 10 cm. 10 cm. 10 cm. 11:14 no movements no movements no movements no movements 11:20 no movements very active no movements no movements movements 11:35 no movements very active movements no movements movements begin 11:40 no movements very active Movements no movements movements slow 11:50 no movements very active no movements no movements movements 12:00 no movements very active no movements no movements movements 12:05 no movements no movements no movements no movements 12:10 Length about Length about Length about Length about 8 cm. 8 cm. 4 cm. 4 cm.