Fire Assaying A Practical Treatise on the Fire Assaying of Gold Silver and Lead Including Description of the Appliances Used by Evans Buskett Fire Assaying is still the preferred method of Ore Analysis to determine gold content in Lode Ores. The Methods have changed little over the last century. This book is a concise compact version of many larger more extensive versions. This concise version is full of the most pertinent information on fire assaying.