214  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Lane  (Alfred  0.) — Continued. 
31.  Recent  explorations  for  oil  and  gas.     Advance  sheets  from  the  Annual  Report 
of  State  geologist,  1904  [Michigan]. 
Mich.  Miner,  vol.  6,  no.  8,  pp.  9-12,  no.  9,  pp.  9-13,  1904. 
Includes  record  of  borings  and  discussion  of  the  strata  passed  through. 
32.  The  role  of  possible  eutectics  in  rock  magmas. 
Jour.  Geol.,  vol.  12,  pp.  83-93,  1  fig.,  1904. 
Discusses  the  quantitative  classification  of  igneous  rucks.  • 
33.  Magnetic  phenomena  around  deep  borings. 
Mich.  Acad.  Sci.,  4th  Rept.,  pp.  166-167,  1904. 
34.  Our  underground  wealth.     Michigan  clay,  shales,  and  paving  materials. 
The  Gateway,  vol.  1,  no.  6,  pp.  49-51,  1904. 
I  "iscusses  the  occurrence  and  utilization  of  days  and  shales  for  paving  materials. 
35.  Gold  near  Lake  Superior. 
The  Gateway,  vol.  3,  no.  3,  pp.  30-32,  1904. 
Gives  observations  upon  the  geology  along  the  international  boundary  and  the  occurrence 
and  mining  of  gold  ores  in  Ontario  and  .Michigan. 
36.  Historical  review  of  the  geology  of  Michigan. 
Mich.  Acad.  Sci.,  5th  Ann.  Rept.,  pp.  184-195,  1904. 
Gives  a  review  of  the  investigations  upon  the  geology  of  Michigan,  a  general  outline  of  the 
geological  structure  and  stratigraphy  of  the  State,  and  a  list  of  publications  bearing  upon 
the  geology  of  the  State. 
37.  The  coarseness  of  igneous  rocks  and  its  meaning. 
Am.  Geol.,  vol.  35,  pp.  65-72,  1  pi.,  1905. 
Discusses  variation  in  size  of  grain  of  igneous  rocks  and  its  causes,  and  points  oul  applications 
which  may  be  made  of  the  facts  staled. 
38.  Underground  waters  of  eastern  United  States:   Lower  Michigan. 
IT.  S.  Geol.  Surv.,  Water-Supply  and  irrigation  Paper  no.  114,  pp.  242-217,  2  tigs.,  1905. 
Describes  briefly  the  general  geology,  the  underground  water  supplies,  and  the  geologic 
horizons  from  which  they  are  obtained. 
39.  Fifth  annual  report  of  the  State  geologist  [Michigan]. 
Mich.  Geol.  Surv.,  Ann.  Kept,  lor  L903,  342  pp.,  ti  pis.,  1905. 
40.  Waters  of  the  Upper  Peninsula  of  Michigan. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  111-167,  1905. 
includes  records  of  wells  and  a  discussion  of  the  strata  passed  through. 
41.  Limestones  [of  Michigan]. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  169-174,  1905. 
42.  Transmission  of  heat  into  the  earth. 
Mich.  Geol.  Surv..  Ann.  Kept,  for  1903,  pp.  195-204,  1905;  Mich.  Engineer,  pp.  229-245,  1904. 
43.  Grain  of  rock. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  205-237,  6  figs.,  1905. 
44.  The  theory  of  copper  deposition. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  239-249,  1905. 
45.  The  Tamarack  Mine  cross  section  and  the  Keweenawan  lodes. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  251-270,  1905. 
Describes  petrographic  characters  of  rocks  in  these  lodes. 
46.  Deep  borings  for  oil  and  gas  [in  Michigan]. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1903,  pp.  271-294,  1905. 
47.  Comment  on  the  "Report  of  the  special  committee  on  the  Lake  Superior  region." 
Jour.  Geol.,  vol.  13,  pp.  457-461,  1905. 
48.  Sixth  annual  report  of  the  State  geologist  [of  Michigan],  for  1904. 
Mich.  Geol.  Surv.,  Ann.  Rept,  for  1904,  pp.  113-168,  1  pi.,  1905;  Mich.  Miner,  vol.  7,  no.  2, 
pp.  12-15;  no.  3,  pp.  12-18;  ho.  4,  pp.  9-12,  1905. 
Chiefly  administrative,  but  includes  various  data  relating  to  the  geology  of  Michigan.  Includes 
and  comments  upon  the  report  of  the  special  committee  for  the  Lake  Superior  region  (see 
Van  Hise  and  others,  1). 
