...shall be the duty of said Board : 1. "To have and exercise general supervision over the supervisors and assessing officers of this State, and to take...to assessment for taxation shall be placed upon the assessItfent rolls and assessed at their true cash value; 2. "To confer with and advise assessing officers...

...shall l:e the duty of said Board: 1. "To have and exercise general supervision over the supervisors and assessing officers of this State, and to take...end that all the properties of this State liable to asseKsraent for taxation shall lie placed upon the assessment rolls and assessed at their true cash...

...specified duty of the commission is "to exercise general supervision over all the assessing officers of the State, and to take such measures as will secure the enforcement of all revenue and taxation laws." Following this provision of the law, the tax commission made an effort...

...officers of this state, over county boards of equalization and apprnl in the performance of their duties, and to take such measures as will secure the enforcement of the provisions of this article, and all the properties of this state liable to assessment for taxation shall be placed upon...

...its judgment of the true cash value, to accomplish that object. The duties of the commissioners were "to take such measures as will secure the enforcement...of the provisions of this act, to the end that all of the properties of the state liable to assessment for taxation shall be placed upon the assessment...

...Duties of board. (1) To have and exercise general supervision over tbe tax-listers i. General superand assessing officers of this State, and to take such measures as will Jj^ra arS'araesssecure the enforcement of the provisions of this act, to the end that ina officers....