Show Mexico Optimistic S Over Silver Prices WASHINGTON Sept 29 UP UP- UP Thomas Thom H. H Lockett commercial a at- at tache in the United States embassy in Mexico City today advised th the commerce department that MexIcan Mexica business men arc are optimistic over advancing advancing ad ad- silver prices Mining companies are proceeding with caution however because of ol uncertainty uncertainty un uncertainty un- un certainty over o future demand an and price Mexican output of ol silver Inthe I Ithe In I the thc first seven months of ol this year yea ear I totaled kilos slightly in excess ex cx- the corresponding correspond cess of ol the figure tyr jn ing period of 1932 |