In the following list, the first head is purely algebraical, and the second nearly so: but they are closely related to observational science, and to the physical subjects which follow.

On this preliminary observational excursion, he followed the presumed Lynd down for nearly 180 miles, until he was convinced that neither in appearance, direction, nor position did it correspond with the river described by Leichhardt.

Observational problems and methods III.

II OBSERVATIONAL PROBLEMS AND METHODS

My chief observational task in Montecito was the study of ideational behavior, or of such adaptive behavior in monkeys and apes as corresponds to the ideational behavior of man.

Situational analysis: an observational approach to introductory sociology.

Situational analysis: an observational approach to introductory sociology.

It exemplifies many of his most sprightly observational qualities.

The training of teachers, as well as actual teaching, is of the nature of scientific, experimental, and observational work.

He was hardly a practical astronomer in the observational sense.