The densities of 2-methyl-2,4-pentanediol, 2,5-hexanediol, 1,7-heptanediol, and 1,2,6-hexanetriol were measured in the range 20 less than or equal to t/degrees C less than or equal to 70. The dielectric permittivities of the same polyhydric alcohols were determined at 1 MHz between 10 and 200 degrees C. The results were compared with literature data.