Horse Traffic Ban Proposal Rejected Trade Board Council Re- fuses Support to the Civic Bureau Suggestion.      No sympathy was expressed at the meeting of the council of the Board of Trade Thursday for the recommmendation of the civic bureau of the board that horse-drawn vehicles be kept off Granville street bridge during the rush hours, morning and evening. The council flatly rejected the suggestion, pointing out that such action would seriously interfere with commerce of the city and especially with industrial plants located on Granville Island.      Another resolution passed by the civic bureau and forwarded to the council for consideration was amended. It concerned the offer of Mr. H.A. Stone and other Vancouver businessmen to present the city with a fund of $100,000 for pictures and art objects. The civic bureau had suggested that the City Council might provide temporary accommodation for the art treasures until a permanent building was obtained.      The amended resolution reads that the thanks of the city be given Mr. Stone and associates for their generous offer and that the City Council make a strong effort to provide a suitable building, so the offer may be accepted. The board also offers, the resolution reads, to give every assistance in its power toward obtaining such a building. A copy of this motion will be forwarded to the City Council.      The council decided to forward a petition to Ottawa signed by the shipping interests of the Greater Vancouver area, asking for a fog alarm at the mouth of the Fraser River at the sandheads knuckle.