A canvas made, not only of homes, but of dealers. Competition is measured up. Every advertiser of a similar product is written for his literature and claims. Thus we start with exact information on all that our rivals are doing. Clipping bureaus are patronized, so that everything printed on our subject comes to the man who writes ads.
what's the meaning of canvas here? and whats the meaning of measuring competition? and more importantly, please explain about this sentence: "Every advertiser of a similar product is wwritten for his literature and claims. also i don't understand the meaning of "Clipping bureaus are patronized"
Thank you for your guides.