per cent. Per cent. Per cent. Per cent. Per cent. Per cent. Per cent. Per cent. 6652 ............... 4 1 0 51-3 3-8 1-4 0-7 0-7 4840* ............... 30-4 64*4 1-65 1-85 0-2 1-8 3413 B ........... 1 31 -6 23-6 — — — 3296 B ........... 67-5 ___ 16-7 _ 15-4 0*4 The glasses 6652 and 4840 were analysed for me by ▇▇. ▇. ▇. ▇▇▇▇▇▇▇▇ ; Mr. ▇. ▇. ▇▇▇▇▇ ; and ▇▇. ▇. ▇. ▇▇▇▇▇▇▇▇, of University College, London, under the direction of ▇▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇. The remaining glasses were supplied many years ago by ▇▇▇▇▇, and their compositions were already known.
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