Gravelle, John

Under a cooperative agreement, J. Robert Clark, Skyline Assayers and Laboratories S. Mary Doherty and Brenda Caughlin, ALS Chemex John Gravel, Acme Analytical Laboratories, Ltd Eric Hoffman, Activation Laboratories, Ltd. and Pierrette Prince, SGS Minerals Services contributed analytical services. 

John Austin 2006. An introduction to behavior-based safety. Stone, Sand Gravel Review (2) 38-39. 

Macadamization (John Loudon McAdam) McAdam designs a method of paving roads with crushed stone bound with gravel on a base of large stones. The roadway is slightly convex, to shed water. 

A Medical Commentary on Fixed Air, 8°, Chester, 1779 2 ed. 1785 (by Falconer) with an appendix on the use of the solution and fixed Alkaline Salts saturated with fixable air, in the Stone and Gravel 3 ed. 1787. John Harrison published The remarkable effects of Fixed Air in Mortifications, 1788. 

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