The variation of the relative intensity of cavitation with temperature has been determined by chemical and erosion methods. The endeavor was to employ both methods under identical conditions of transducer frequency, power input to the transducer, height of test samples over the transducer face, etc. The liberation of chlorine from a saturated solution of carbon tetrachloride in water with ortho-tolidine reagent as indicator was employed in the chemical method and cavitation intensity was expressed as the optical density of the resulting yellow solution for blue light of 436 mμ. An expression of optical density in terms of peak percentage absorption of the yellow solution was used to stress observations in this method of determining cavitation activity. In the erosion method, lead samples were used and the intensity of cavitation was expressed as the loss in weight of the sample after exposure to cavitation. The results obtained were fed into a computer and equations derived for the respective measurements. These results and other observations on the experimental work are discussed.