262 APPENDIX TO PART IV. 
at our request, thirty microscopic sections cut from the following numbers: 1, 3, 6, 8, 
10-12, 14, 16, 19-21, 23, 26, 29, 32, 44, 46, 49, 57, 62, 76, 79, 83, 128, 94, 96-98, 107, 
126, 139, 164, 178, 179, 212, 217, 225, 240. Many of them have been figured in our 
plates, and are further explained in a descriptive commentary accompanying the slides 
and specimens purchased. 
Porphyritic Gneiss. To this belong Nos. 105-109, and 149. It has been cut by 
Nos. 7 and 14. 
Bethlehem Gueiss. Nos. 102, 103, L11, 112, 113, 119, 124, 126, 133, 196, 244, 218, 
220. ‘ 
Lake Winnipiseogee Gneiss. Nos. 50, 52, 53, 101, 110, 117, 118, 120, 121, 122, 
125, 127, 137, 206, 208, 250. It has been cut, probably, by No. 8. 
Montalban Group. Nos. 46-49, 51, 54, 55, 58-60, 114, 116, 123, 135, 139, 138, 145, 
159, 160, 210, 237. 
The following intrusive rocks have cut this formation: Nos. 2, 6, 11-13, 19, 20, 22, 
and 24. 
Franconia Breccia. Nos. 74 and 75, with Nos. 72 and 73 for cement, cut by No. 15. 
Huronian (Hornblende schist). Nos. 217, 219, 221-226. 
Lisbon Group. Nos. 104, 128, 130, 132, 150, 151, 153, 184, 201, 211-216, 228-231, 
241 ;—cut by No. Io. 
Lyman Group. Nos. 143, 144, 164-166, 168, 174, 183, 197-199, 242, 249 ;—Ccut by 
Nos. 16, 17, 18. Swift Water series, 167; auriferous conglomerate, 236. 
Merrimack Group. Nos. 140, 204, 175. 
Ferruginous Slate Group. No. 240. 
Rockingham Group. Nos. 154, 45, 207. 
Kearsarge Andalusite Group. Nos. 134, 141, 146, 156-158, 163. 
Cambrian Slates. Nos. 99, 169-171, 173, 181, 182, 232, 234, 235, 239. 
Cois Group (Quartzite of Vol. II). Nos. 186-188, 190-193, 200, 203. 
Mica Schist and Staurolite Rocks. Nos. 136, 142, 147, 148, 161, 162, 172, 177, 
178, 180, 189, 227, 243, 238 ;—cut by Nos. 1 and 9. 
Calciferous Mica Schist. Nos. 155 and 248. 
Helderberg. Nos. 152, 176, 205, 209, 245-247. 
To Conway granite are referred Nos. 62-65, 67, 81, 82, 86;—cut by Nos. 4, 5, 25. 
Albany Granite. Nos. 39, 79, 86, 87, 88. 
Chocorua Granite. Nos. 76-78, 80, go. 
Exeter Sienite. No. 71; other sienites, Nos. 95, 96, 85, 97. 
Pequawket Breccia. Nos. 40-44. Granite cutting Cods group, No. 57. 
