^{page 502 note 1} These traps were not included in calculating the number of rats per 100 traps set.

^{page 504 note 1} Petrol, especially the “Shell Brand,” does equally well.

^{page 526 note 1} These observations have been repeated in Poona for the year 1909–1910 (when there was no epidemic plague) and very similar results have been obtained.

^{page 526 note 2} A rat of 100–150 grammes has nearly three times the skin area of a mouse of 20–30 grammes.

^{page 530 note 1} The possibility must be considered that a large mortality among the rats might to some extent concentrate the fleas upon the survivors and so bring about an increase of fleas per rat. As a matter of fact in Poona fleas and rats appeared to be most abundant about the same time.

^{page 534 note 1} The failure to obtain dead rats in any quantity in Poona may have given an erroneous picture of the intensity of the epizootic at different times.