Honeybees were studied to determine what affects their energy consumption
Temp is the outside temperature
Sucr is the sucrose concentration of the liquid
Rate is the joules/second that the bee expended in drinking the liquid
H Hamaker Experimental design in industry Biometrics 11, 257-286 1955

temp sucr rate
20 20 3.1
20 20 3.7
20 20 4.7
20 40 5.5
20 40 6.7
20 40 7.3
20 60 7.9
20 60 9.2
20 60 9.3
30 20 6.0
30 20 6.9
30 20 7.5
30 40 11.5
30 40 12.9
30 40 13.4
30 60 17.5
30 60 15.8
30 60 14.7
40 20 7.7
40 20 8.3
40 20 9.5
40 40 15.7
40 40 14.3
40 40 15.9
40 60 19.1
40 60 18.0
40 60 19.9