Slide rule 8inch Howitzer
Forward Observation Post of "B" Battery, 1st Field Regiment, Royal Canadian Artillery. (L-R): Gunner Chuck Drickerson (rangefinder), Gunner Jim Tulley (field telephone), Regimental Sergeant-Major G. Doug Gilpin (binoculars), Captain George E. Baxter (map board) and Gunner Hugh Graham (radio). Stirton, Alexander Mackenzie.

Near Potenza, Italy, September 24, 1943

The following topics are handling about a number of Artillery instruments used for shooting, ranging, etc.