single achromatic lens will give sharp definition and good contrasts. For general landscape-work a medium-angle, rectilinear lens will be found satisfactory. The angle of view of the lens should be from 45° to 60°. ADVERTISEMENTS. [Illustration: ROYAL BAKING POWDER] A cream-of-tartar baking powder. Highest of all in leavening strength.--_Latest United States Government Food Report._ ROYAL BAKING POWDER CO., NEW YORK. [Illustration: THOMPSON'S EYE WATER] [Illustration: BICYCLING] This Department is conducted in the interest of Bicyclers, and the Editor will be pleased to answer any question on the subject. Our maps and tours contain many valuable data kindly supplied from the official maps and road-books of the League of American Wheelmen. Recognizing the value of the work being done by the L.A.W., the Editor will be pleased to furnish subscribers with membership blanks and information so far as possible. [Illustration: Copyright, 1896, by Harper & Brothers.] Continuing the journey begun last week from Chicago, we start from Joliet for the run to Ottawa. From Joliet continue along the river and canal. It might be well to inquire the condition in which the tow-path and the road happen to be at the time of your going over the trip, in order that you may take the one most used by wheelmen. Sometimes the tow-path is better, and other times the road should be taken. Here is one of the advantages of being a member of the L.A.W., since the local consul will gladly give you any information on this matter or any other concerning that particular country that you may desire. Generally speaking, it is well to keep to the tow-path, as the ride is more picturesque along the canal.