But the eye is tolerant of small changes in the focal adjustment which sensibly affect the scale-value.
The outer pair receive the strain of the rotator, and the inner are for adjustment and to prevent lateral movement.
The effect of each of the elements of the grating is then the same; and, unless this vanishes on account of a particular adjustment of the ratio a: d, the resultant amplitude becomes comparatively very great.
(9), in which it is to be noticed that the adjustment necessary to secure the disappearance of sin 2w is sufficient also to destroy the term in sin' w.
A special feature in the operations is the provision, necessitated by the record of the legal population, for the inclusion in the local return of the persons temporarily absent on the date of the census, and their adjustment in the general aggregates, a matter to which considerable attention is paid.