calculation as to the difference between cost and collection; nor will they declare the fees to be excessive unless it is made clearly to appear that- they are obviously and largely beyond what is needed to pay for the inspection services rendered.”' Foote & Co. v. Maryland, 232 U. S. 494, 504, and Western Union Telegraph Co. v. New Hope, 187 U. S. 419.
; The findings of fact give the following statement of receipts and expenses under the law' assailed, from and > including the year 1909, in which ibwa's passed, to April 30, 1915, which includes the last day covered by the claim in suit, viz:
Year Receipts Expenses Percentage of Receipts Used for Department Expenses
1909 $34,934 $30,288 ' 87%
July 31, 1914, to April 30, 1915, 62,689 46,863 75%
This statement of- expenses, however, does not include any charge for offices for the Oil Department, which were in the state capitol, for the services of the state auditor and treasurer in keeping accounts and making collections, for legal counsel, and for services of chemists, or for the Public Examiner’s Department, these, not being susceptible of exact determination. The reduced percentage of expenses to receipts in,several of the years was obviously due to the rapid expansion in the use of gasoline without a corresponding increase in. the expenses'of administration. This percentage, however, was rising in 1915 and doubtless, has increased greatly since, under war conditions. We take judicial notide also of the fact that.in 1915 the inspection