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1. Correspondence to Dr. V. H. Gottschalk from R. S. Dean with attachments

2. Correspondence to R. K. Tiffany from John W. Finch with attachments

3. Correspondence to R. S. Dean from H. A. Doerner with attachments

4. Correspondence to Dr. A. C. Fieldner from H. A. Doerner discussing magnesium, with attachments