CO'NTRACTIONS OF AMPHIBIAN MUSCLE 
315 
Fig. SS. A Typical Two-maxima and Three-maxima Curve. 
10-10 illustrates a typical three-maxima curve which was plotted at every tempera- 
ture. The numbers (10-10) denote the number of the experiment. 
22-22 represents a typical two-maxima curve and each temperature is plotted. The 
numbers (22-22) as before denote the number of the experiment. 
twenty there were twelve greater than the greatest maximum and 
eight less than it. For seven which recorded at all tem- 
peratures it was 2.0 centimeters greater than the greatest maxi- 
mum. As in the case of the conglomerate average (A-A^), rigor 
of the three-maxima curve was less than the greatest maximum. 
The two-maxima rigor maximum was greater as was that of 
B-B' and was 1.9 centimeters greater. It is^ of course, rather 
difficult to evaluate results in terms of height of tracing, but 
comparative figures may have some value. 
The only one to give any information on the subject is Howell ^ 
and he does not state where the information may be found or how 
it was obtained. I presume his statement of the position of the 
maxima applies to a series of experiments on individuals and 
is interpreted accordingly and is not based upon combined aver- 
ages. Below is shown a table of results by several observers. 
Table II shows the results when taken from all the curves as 
shown in figures 53, 54 and 55. 
SUMMARY 
When exsected gastrocnemius muscle of the frog is subjected 
to a relatively low temperature ( — 7°C.) two and three maxima 
