The chief of police shall assign to each man his round of duty and may order any of them to render service in any ward wherever and whenever, in his opinion, the occasion shall require it. He shall report in writing to the city manager the time actually served by each policeman, the time absent and such other information as he may deem proper or may from time to time be required by the city manager. He shall also see that the policemen are equipped with the proper arms and equipment which any emergency shall require. He shall see that they perform their duties and he shall report each failure promptly to the city manager. He shall, as far as practicable, cause all orders of the city manager to be faithfully executed. (Code 1941, Art. 109-4)