It seems that there is no book that treats the measurement of the physical pa­ rameters of explosives as its only subject, although limited information is avail­ able in a number of books. Therefore, I have tried to bridge this gap in the lit­ erature with this book. A large number of various physical parameters have to be determined ex­ perimentally in order to test or characterise an explosive. Various physical principles have been applied for such measurements. Accordingly, a large number of different experimental methods exist, as well as various testing appa­ ratuses and procedures. On the other hand, great progress has been made recently