L.1915, c. 325, s. 12, p. 593, as amended by L.1918, c. 58, s. 4, p. 170 [1924 Suppl. s. 136-3650A(12) ], said amendatory section being section four of an act “An act to amend an act entitled “An act providing for the regulating, care and control of shade trees and shrubbery upon the public highways and in municipal parks, and for the care, control and improvement of such parks; authorizing the continuance of existing shade tree commissions, and the appointment of shade tree commissions and prescribing their powers and duties’ (Revision of 1915), approved April fourteenth, one thousand nine hundred and fifteen,” approved February sixteenth, one thousand nine hundred and eighteen, saved from repeal. [This section preserved shade tree commissions established theretofore, prescribed their duties and provided for the disposition of funds, rights of employees and execution of their contracts.]