Winter's Entertainment by Terry L. Helser

Ammonia-Air Mixtures Can Be Explosive by David Tudela
Re: article by S. Toby
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Teaching Statistical Methods by Ken Muranaka
Re: article by K. Thomasson, S. Lofthus-Merschman, M. Humbert, and N. Kulevsky
The author K. A. Thomasson replies

Properties of Zeolite A Obtained from Powdered Laundry Detergent by Pamela J. Davis, Herman van Bekkum, and Eric N. Coker
Re: article by D. A. Lindquist and A. L. Smoot
The author D. A. Lindquist replies

Photon-Initiated Hydrogen-Chlorine Reaction by Richard W. Schwenz and Lynn Geiger
Re: article by L. M. Egolf and J. T. Keiser (J. Chem. Educ. 1993, 70, A208)

Precision and Accuracy in Measurements by Volker B. E. Thomsen
Re: article by R. Treptow
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