8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 
Magnesia, in vitrifying clays, 4, 
53- 
in yellow and buff brick, 4, 
54. 
Magnetite, 4, 31, 40. 
Mallomonas, 2, 21, 24. 
Manufacture of brick, 4, 73. 
Manufacture of earthenware, 4, 
Manufacture of fire-brick, 4, 34, 
7. 
Manufacture of paper, 
used for, 4, 52. 
Manufacture of stoneware, 4, 
34, 89. . 
Manufacturers of brick, 4, 92. 
Manufacturers of pottery, 4, 93. 
Marasmius, 3, 17, 25. 
Marcasite, 4, 33, 40. 
Marine clays, 4, 20. 
Maryna, 2, 39. 
Massachusetts, gravel deposits 
in, 4,23. | 
retreat of ice into, 4, 24. 
till in Connecticut derived 
from, 4, 23, 25. 
Mastigameceba, 2, 20, 21. 
Mastigophora, 2, II, 19. 
Maywood, N. Y., 4, 71. 
Melanterite in clay, 4, 33. 
Menoidium, 2, 25, 28. 
Merulius, 3, 55, 62. 
Mesodinium, 2, 42, SI. 
Metanema, 2, 30, 31. 
Metopus, 2, 53, 54. 
Mica, alteration of, 4, 17. 
alumina in, 4, 31. 
as source of alkalies in clay, 
clays 
4, 30. 
composition of, 4, 40. 
in Connecticut brick clays, 
4, 59, 60. 
in West Cornwall kaolin, 4, 
58. 
plasticity of, 4, 45, 46. 
Microcometes, 2, 14. 
Microglena, 2, 24. 
Microgromia, 2, 14, 16. 
Microscopic: examination of 
Connecticut clays, 4, 59. 
Microthorax, 2, 41, 50. 
Middletown, becuias of clay 
at, 4, 24. 
exit of glacial water 
through, 4, 25. 
high gravel deposits at, 4, 
23. 
ice front at, 4, 24. 
Milldale clay area, 4, 14, 62. 
Milldale lake, draining of, 4, 
28. 
Minerals, in clay, 4, 39, 40. 
silica in, 4, 31. 
water in hydrous, 4, 38. 
Mining, hydraulic method of 4, 
71. 
of clay, 4, 41, 73. 
of feldspar and quartz, 4, 71. 
of kaolin, 4, 7I. 
Missouri clays, 4, 30, 43, 45, 48, 
53, 64. 
Molds, effect of shrinkage on 
size of, 4, 47. 
Monadina, 2, 19, 20. 
Monas, 2, 21, 22. 
Monobia, 2, V7. 
. Monosiga, 2, 38. 
Montowese, Conn., 4, 14. 
Muscovite, composition of, 4, 
40. 
Mycena, 3, 17, 28. 
Nassula, 2, 41, 47. 
Naucoria, 3, 19, 44. 
Nebela, 2, 13. 
Neovossia, 5, 30. 
Iowensis, 5, 30. 
Nephroselmis, 2, 33. 
New England, elevation of 4 
22. 
glaciation of, 4, 23. 
prospecting for clays in, 4, 
69, 70. 
New genera, 2, 40, 42, 52, 53, 
56, 58. 
New Hampshire, rock débris 
from, 4, 25. 
New Haven, 4, 14, 78. 
New Teey clays, 4, 30, 33, 37, 
87. 
New Milford, 4, 80. 
Newfield, analysis of clay from, 
_ 4 59, 60 
Newington, 4, 13, 25. 
» Nodules of lime carbonate in 
clay, 4, 35. 
Nodules of pyrite in clay, 4, 33. 
North Haven, 4, 14, 26, 59. 
North Stonington, 4, 72. 
Northern clay area of Connec- 
ticut, 4, II. 
Northern Glacial lake in Con- 
necticut valley, outlet of, 
4, 25. 
waters from, 4, 26. 
Notosolenus, 2, 20, 22. 
