As for types of glazes, we're still novices at it, we've had good and bad. But we high fire to cone 10, it takes 17 hours to fire and we go into slight reduction from 1800 F., on heavy reduction at 8+ to 9, and rapid cooling down to 1000 (Mike Cardeau Firing Schedule). My house is without heat when we fire as we're on a low pressure service. The first time we didn't reach cone 9 as the kiln was not loaded properly. So we called fora “kiln doctor" (Don Hutchinson) who came when called at 9 at night, and we found out that we had too much space between pots, etc., and a few other tips, such as - all pots the same size on one shelf, 2" from bagwalls and ceiling, space between middle of shelves for flames to circulate, and no more than 1" spart for pots, and use lots of cones. I do three months steady potting to fill it, and the cost for firing in winter is 7 to 8 dollars. And we're looking forward again to our next firing. rene Perry == HEINZ LAFFIN'S RILN ON HORNSBY [ISLAND I am delighted to pass on some information about my kiln. It was built as a joint effort by Wayne Naan, Jack Wells and myself when Wayne and I moved to Hornby in 1967. Type: Two chamber downdraft, Propane fired. The people who attended Paul Soldner's kiln building workshop in Seattle 1967, will remember the 2 cham- ber updraft kiln we built there. I adopted the basic désign with certain modifications, e.g. increased capacity, baffle walls instead of under floor firing, incorporating by-pass in the flue system etc. Size: Glost chamber: approx. 35x36x50 (height)inches (40 cu.ft.) Bisque chamber: approx.2,/3 size of glost chamber. Height of stack: Almost 20 ft. (inside dimension:133x134") 4,