Four ultrasonic methods were evaluated for assembly of experimental plastic parts for detonators: (1) welding, (2) crimping and staking, (3) insertion, and (4) reactivation of adhesives. For welding, staking and insertion, plastics with low elastic moduli, such as acrylics and polycarbonate, produced the best results. Thermosetting, hot-melt, and solution adhesives could all be activated ultrasonically to form good bonds on plastics and other materials. This evaluation indicated that thermoplastic detonator parts could be assembled ultrasonically in shorter times than by present production techniques with high bond strengths and high product acceptance rates.

There is relatively little information concerning chromosomal anomalies in malignant lymphomas particularly of different histologic types. This is due to the difficulty of obtaining adequate numbers of mitotic cells from solid tissues in general, as well as to insufficient data or lack of consistency in the classification among reported cases. The present report concerns preliminary chromosome findings in 30 patients with malignant lymphoma of various types, and related disorders. This study was undertaken to provide additional cytogenetic criteria aiding the classification of these disorders by detecting chromosomal abnormalities characterisitic of different histologic grooups.

None

This report compiles articles for and against The Family Assistance Act in order to represent the variety of views associated with the Act.

None