H. M. March 17, 1st circle was made in 6 30 19, 2nd 7 0 22, 3rd 8 30 (very cold day) 24, 4th 6 45 _Thunbergia alata_ (Acanthaceæ) moves against sun. H. M. April 14, 1st circle was made in 3 20 18, 2nd 2 50 18, 3rd 2 55 18, 4th 3 55 (late in afternoon) _Adhadota cydonæfolia_ (Acanthaceæ) follows the sun. A young shoot made a semicircle in 24 hrs.; subsequently it made a circle in between 40 hrs. and 48 hrs. Another shoot, however, made a circle in 26 hrs. 30 m. _Mikania scandens_ (Compositæ) moves against the sun. H. M. March 14, 1st circle was made in 3 10 15, 2nd 3 0 16, 3rd 3 0 17, 4th 3 33 April 7, 5th 2 50 7, 6th 2 40 This circle was made after a copious watering with cold water at 47° Fahr. _Combretum argenteum_ (Combretaceæ) moves against the sun. Kept in hothouse. H. M. Jan. 24, 1st circle was made in 2 55 Early in morning, when the temperature of the house had fallen a little. 24, 2 circles each at an 2 20 average of 25, 4th circle was made in 2 25 _Combretum purpureum_ revolves not quite so quickly as _C. argenteum_. _Loasa aurantiaca_ (Loasaceæ). Revolutions variable in their course: a plant which moved against the sun. H. M. June 20, 1st circle was made in 2 37 20, 2nd 2 13 20, 3rd 4 0 21, 4th 2 35 22, 5th 3 26 23, 6th 3 5 Another plant which followed the sun in its revolutions.