Abstract: Volatile content of a sample is determined by volatilizing a portion of such content, taking weight measurements at uniform intervals during such volatilization after a preselected delay, obtaining differences between weight measurements taken at times separated by a predetermined uniform measure and processing such weight differences.

Abstract: A steered beam B-scan ultrasonic imaging system has a linear transducer array divisible into multiple sub-arrays of transducer elements each operable to perform a sector scan, with the origin points displaced longitudinally along the array between sector scans. The system performs overlapping sector scans and is capable of imaging randomly oriented specularly reflecting targets. Time delays in the transmitting and receiving channels to steer the transmitted beam and to focus the received echoes are provided by digital techniques, by reversible digital shift registers, or by charge coupled device delay lines. The multiple sector image is displayed in real time in an intensity versus displacement format on a cathode ray tube.

Abstract: An improved corrugator roll for use in an apparatus for making corrugated paperboard wherein the flute tip and a portion flank of the roll base metal are selectively hardened to a predetermined depth by an electro magnetic process. The valleys of the flutes and the remainder of the flank are maintained at the same hardness as the base material.