General Index to Volume I. 
Numbers of bulletins are in’ full-face type; numbers of 
pages in common type. 
Bulletin numbers without page num- 
bers are given for authors and subjects of bulletins. 
Abrasion, effect of, on brick, 
a 4, 86. 
Absorbent nature 
earth, 4, 56. 
Acanthocystis, 2, 17. 
Acirieta, 2, 65. 
Actinobolus, 2, 40. 
Actinophrys, 2, 17, 18. 
Actinosphzrium, 2, 17. 
Adobe, 4, 21, 55, 56. 
fEgyria, 2, 42. 
Agaricacee, 3, 13. 
key to genera of, 3, 16. 
Agaricus, 3, 19, 48. 
Air, drying of clay in, 4, 37. 
shrinkage of clay in, 4, 46. 
Albany slip clay, 4, 80. 
Albite, composition of, 4, 40. 
Alkalies, in Connecticut clays, 
4, 29, 60, 61. 
in refractory clays, 4, 36. 
in vitrifying clays, 4, 36. 
influence of, on clay, 4, 36, 
48, 50. 
sulphates and chlorides of, 
of fuller’s 
4 37- 
Alluvial clays, 4, 19. : 
Alteration products of minerals, 
4, 31. 
Alum, composition of, 4, 40._ 
Alumina, attacked by sulphuric 
acid, 4, 38. 
in Connecticut clays, 4, 59, 
60. 
influence of, in clay, 4, 31. 
Amanita, 3, 17, 20. 
‘Amanitopsis, 3, 17, 22. 
Ammonia in clay, 4, 36, 46. 
Ameeba, 2, 12, 14. 
Amphidinium, 2, 39. 
Amphileptus, 2, 41, 46. 
Amphimonas, 2, 32, 34. 
Amphisia, 2, 57. 
Amphitrema, 2, 14. 
Amphizonella, 2, 12. 
Analyses of brick clays, 4, 54, 
59, 60. 
of fire-clay, 4, 36, 52. 
of slip clay, 4, 55. 
of stoneware clays, 4, 53. 
of vitrifying clays, 4, 53. 
of washed kaolins, ‘4, 52. 
Anellaria, 3, 20, 52. 
Anisonema, 2, 30, 31. 
Anoplophrya, 2, 40, 43. 
Anorthite, composition of, 4, 40. 
Anthophysa, 2, 21, 23. 
Arcella, 2, 12, 15. 
Argillaceous odor, 4, 46, 63. 
Armillaria, 3, 17, 24. 
Ascoglena, 2, 25. 
Aspidisca, 2, 57, 61. 
Assulina, 2, 13. 
Astasia, 2, 26, 209. 
Astasiopsis, 2, 25. 
Astylozo6n, 2, 62. 
Atkinson, G. F., 3, 6. 
Atractonema, 2, 25. 
Balantidium, 2, 53, 56. 
Barium salts, use of, in clay, 
., & 35. 
Basidiomycetes, 3, I1. 
‘Belladina, 2, 57. 
Berlin, 4, 23, 24, 26, 59, 62, 75. 
Berlin clay area, 4, 13. . 
Berlin lake, 4, 24, 25, 26, 28. 
