164 EDWIN GILPIN ON LIMESTONES 
Sample B.—From overlying part of same bed. White and gray, not very compact, 
crystalline limestone, weathering red, with a few crystals of galena and iron pyrites, and 
obscure fossil markings. 






Composition. SAMPLE À. SAMPLE B. 
MOISTUrE. Eee et meemeese esse seen 1-250 115 
Mimelcarbonate eet laleleleletelerallctetelalieresiel cieieleleie ete ec 91-500 58-766 
Masnesia carbonate certe etc meressaesecsete eile 465 9-890 
TMOMMCANDONALE eeiefetialtete ace eiselcteiewlsinsicisieiecicle eloneesteete 2-278 26-812 
Manpaneso etes ere eme ee eee trace 1:255 
J Abbe eee ee ces eee ee GM) Nopdpannedooboe 
1 és hogoonnocdodonncocs “000000000000 00 0 DÉCO 737 168 
Phosphoric acid......... Door v--sccscserccte PIG OE | Dooaccoc vus 
Insoluble residue.................................... 1-856 3°082 
AKON 6500 0000 Sy dondag duo 98-794 100°088 


(4.) McLean LIMESTONE.—Compact gray limestone, with abundant fossil coral 
markings. 





Composition. SAMPLE A, SAMPLE B. 
= Moisture,...... +++ aoboode oo CoOUDDIOdaS Here -18 ail? 
Timecarbonate -ceec-checre-rceers Job on 0660 93:90 96: 26 
Magnesia carbonate........ nano Too Ado To Tabou 2°45 2°33 
TOMB PETOXAG Grays oistarsaarerelclellclereievela)ieieleleliele/ermieinedeteleisiaieimterals “59 67 
Manganese) WperOxidos esters eee---2 0: scene: 56 -55 
SAMUI ANA TE ee ess secs do 000 OON LORS NNO To nc 12 10 
SUIDRUT sreteceletutetavelalale\ sta slovelelsie) ciereicie ele cleree eetelateiceite 55000 “03 02 
Phosphoric acid .......... Odoconraqauvo: davulomotoneac 03 03 
WUTC een rence mec con eseercscecesesscec ses ececes 2-10 1.99 
MOTAT wre ele cesse etre 99°96 102-02 



Analyst, Durham College of Science. 
