Items

• [D0109AAA], Letter from William Joseph Hammer, American Institute of Electrical Engineers to Thomas Alva Edison, February 11th, 1901
  1901-02-11
• [D0206AAR], Letter from William Joseph Hammer to Thomas Alva Edison, May 31st, 1902
  1902-05-31
• [D0221AAC], Letter from William Joseph Hammer to Thomas Alva Edison, April 21st, 1902
  1902-04-21
• [D0231AAB], Letter from William Joseph Hammer to Thomas Alva Edison, April 18th, 1902
  1902-04-18
• [D0231AAC], Letter from William Joseph Hammer to Thomas Alva Edison, April 26th, 1902
  1902-04-26
• [D0231AAG], Letter from William Joseph Hammer to Thomas Alva Edison, May 20th, 1902
  1902-05-20
• [D0231AAM], Letter from William Joseph Hammer to Thomas Alva Edison, May 27th, 1902
  1902-05-27
• [D0324ABV], Letter from William Joseph Hammer to Thomas Alva Edison, December 30th, 1903
  1903-12-30
• [D0331AAI], Letter from William Joseph Hammer to Thomas Alva Edison, November 20th, 1903
  1903-11-20
• [D0331AAJ], Letter from William Joseph Hammer to Thomas Alva Edison, December 14th, 1903
  1903-12-14
• [D0406AAA], Letter from William Joseph Hammer to Thomas Alva Edison, January 2nd, 1904
  1904-01-02
• [D0406AAJ], Letter from William Joseph Hammer to Thomas Alva Edison, February 15th, 1904
  1904-02-15
• [D0406AAU], Letter from William Joseph Hammer to Thomas Alva Edison, May 2nd, 1904
  1904-05-02
• [D0406ABJ], Letter from William Joseph Hammer to Thomas Alva Edison, June 22nd, 1904
  1904-06-22
• [D0419AAF], Letter from William Joseph Hammer to Thomas Alva Edison, March 5th, 1904
  1904-03-05
• [D0419AAO], Letter from William Joseph Hammer to Thomas Alva Edison, June 22nd, 1904
  1904-06-22
• [D0606ABJ], Bill/Receipt from William Joseph Hammer to Thomas Alva Edison, November 10th, 1906
  1906-11-10
• [D1016ACH], Letter from William Joseph Hammer to Thomas Alva Edison, June 30th, 1910
  1910-06-30
• [D8123L], Letter from William Joseph Hammer to Thomas Alva Edison, February 19th, 1881
  1881-02-19
• [D8123ZBS], Letter from William Joseph Hammer to Samuel Insull, May 10th, 1881
  1881-05-10
• [D8123ZFZ], Memorandum, William Joseph Hammer, 1881
  1881-00-00
• [D8125A], Test Report, William Joseph Hammer, Edison Lamp Co, May 1881
  1881-05-00
• [D8125B1], Letter from William Joseph Hammer to Thomas Alva Edison, June 1881
  1881-06-00
• [D8125B2], Test Report, William Joseph Hammer, Edison Lamp Co, June 1881
  1881-06-00
• [D8125F], Test Report, William Joseph Hammer, Edison Lamp Co, September 30th, 1881
  1881-09-30
• [D8136J], Letter from William Joseph Hammer to Otto A Moses, April 13th, 1881
  1881-04-13
• [D8242C], Letter from William Joseph Hammer to Thomas Alva Edison, July 10th, 1882
  1882-07-10
• [D8333ZAG], Test Report, William Joseph Hammer, 1883
  1883-00-00
• [D8337ZCV], Letter from Deutsche Edison Gesellschaft, William Joseph Hammer to Thomas Alva Edison, July 6th, 1883
  1883-07-06
• [D8337ZDB], Letter from William Joseph Hammer to Thomas Alva Edison, July 16th, 1883
  1883-07-16
• [D8337ZDC], Letter from Deutsche Edison Gesellschaft, William Joseph Hammer to Thomas Alva Edison, July 16th, 1883
  1883-07-16
• [D8337ZEJ], Letter from William Joseph Hammer to Thomas Alva Edison, September 21st, 1883
  1883-09-21
• [D8337ZGH], Letter from William Joseph Hammer to Thomas Alva Edison, November 9th, 1883
  1883-11-09
• [D8436ZCU], Letter from William Joseph Hammer to Thomas Alva Edison, June 16th, 1884
  1884-06-16
• [D8733AAN], Letter from William Joseph Hammer to Boston Edison Co, September 7th, 1887
  1887-09-07
• [D8805AFY], Letter from William Joseph Hammer to Thomas Alva Edison, August 30th, 1888
  1888-08-30
• [D8842AAT], Letter from William Joseph Hammer to Thomas Alva Edison, 1888
  1888-00-00
• [D8905AJI], Letter from William Joseph Hammer to Thomas Alva Edison, December 8th, 1889
  1889-12-08
• [D8907ACJ], Letter from William Joseph Hammer to Jonathan Lewis Young, October 1889
  1889-10-00
• [D8946AAM], Letter from William Joseph Hammer to Thomas Alva Edison, March 1st, 1889
  1889-03-01
• [D8946AAZ], Letter from William Joseph Hammer to Thomas Alva Edison, April 6th, 1889
  1889-04-06
• [D8946ABE], Telegram from William Joseph Hammer to Thomas Alva Edison, April 22nd, 1889
  1889-04-22
• [D8946ABO], Letter from William Joseph Hammer to Francis Robbins Upton, Edison Lamp Co, May 13th, 1889
  1889-05-13
• [D8946ABQ], Letter from William Joseph Hammer to Edison Lamp Co, Francis Robbins Upton, May 22nd, 1889
  1889-05-22
• [D8955AAL], Telegram from William Joseph Hammer to Thomas Alva Edison, February 2nd, 1889
  1889-02-02
• [D9131AAC], Letter from William Joseph Hammer to Edison General Electric Co Lamp Works, Francis Robbins Upton, February 9th, 1891
  1891-02-09
• [D9802AAH], Letter from William Joseph Hammer to General Electric Co, William J Jenks, March 22nd, 1898
  1898-03-22
• [D9802AAI], Letter from William Joseph Hammer to William J Jenks, General Electric Co, April 2nd, 1898
  1898-04-02
• [D9802AAR], Bill/Receipt from William Joseph Hammer to John F Randolph, May 24th, 1898
  1898-05-24
• [D9802AAT], Letter from William Joseph Hammer to West Orange Laboratory, June 23rd, 1898
  1898-06-23
• [D9802ABB], Letter from William Joseph Hammer to William J Jenks, 1898
  1898-00-00
• [D9802ABC], Letter from William Joseph Hammer to Thomas Alva Edison, 1898
  1898-00-00
• [E1220DM], Letter from William Joseph Hammer to William Henry Meadowcroft, August 20th, 1912
  1912-08-20
• [E1229AY], Letter from William Joseph Hammer to Thomas Alva Edison, September 15th, 1912
  1912-09-15
• [E1334AU], Letter from William Joseph Hammer to Thomas Alva Edison, October 8th, 1913
  1913-10-08
• [E1574BD], Letter from William Joseph Hammer to William Henry Meadowcroft, December 27th, 1915
  1915-12-27
• [E1948AV1], Letter from William Joseph Hammer to William Henry Meadowcroft, May 8th, 1919
  1919-05-08
• [E1955BF], Letter from William Joseph Hammer to Thomas Alva Edison, November 25th, 1919
  1919-11-25
• [F5c05H], Letter from Edison Pioneers, William Joseph Hammer to Mina Miller (Mrs Thomas A.) Edison, April 7th, 1920
  1920-04-07
• [F5C05H1], Letter from William Joseph Hammer to Edison Pioneers, April 5th, 1920
  1920-04-05
• [F5C05I], Letter from William Joseph Hammer to John William Lieb, April 7th, 1920
  1920-04-07
• [F5F11BJ], Letter from Edison Pioneers, William Joseph Hammer to Mina Miller (Mrs Thomas A.) Edison, December 12th, 1920
  1920-12-12
• [F5F15AC], Letter from William Joseph Hammer to Mina Miller (Mrs Thomas A.) Edison, March 14th, 1925
  1925-03-14
• [LB006451], Letter from William Joseph Hammer to James A Russell, October 5th, 1880
  1880-10-05
• [LB030101A], Telegram from William Joseph Hammer to Thomas Alva Edison, May 29th, 1889
  1889-05-29
• [LB031083A], Telegram from William Joseph Hammer to Thomas Alva Edison, June 26th, 1889
  1889-06-26
• [LB031137A], Telegram from William Joseph Hammer to Thomas Alva Edison, June 1889
  1889-06-00
• [MBSB8B3219], Article, William Joseph Hammer, January 16th, 1895
  1895-01-16
• [MU076], Letter from William Joseph Hammer to Dr Sylvester, May 1885
  1885-05-00
• [N019055], Technical Note, William Joseph Hammer, March 26th, 1880
  1880-03-26
• [N019057], Technical Note, Charles Batchelor, William Joseph Hammer, March 27th, 1880
  1880-03-27
• [N019093], Technical Note, William Joseph Hammer, June 18th, 1880
  1880-06-18
• [N019095], Technical Note, William Joseph Hammer, June 19th, 1880
  1880-06-19
• [N019097], Technical Note, William Joseph Hammer, June 21st, 1880
  1880-06-21
• [N019099], Technical Note, William Joseph Hammer, June 23rd, 1880
  1880-06-23
• [N019101], Technical Note, William Joseph Hammer, June 24th, 1880
  1880-06-24
• [N019111], Technical Note, William Joseph Hammer, June 26th, 1880
  1880-06-26
• [N019115A], Technical Note, William Joseph Hammer, June 14th, 1880
  1880-06-14
• [N019115B], Technical Note, William Joseph Hammer, June 15th, 1880
  1880-06-15
• [N019117], Technical Note, William Joseph Hammer, June 16th, 1880
  1880-06-16
• [N019119], Technical Note, William Joseph Hammer, July 17th, 1880
  1880-07-17
• [N019121], Technical Note, William Joseph Hammer, July 19th, 1880
  1880-07-19
• [N019123], Technical Note, William Joseph Hammer, July 20th, 1880
  1880-07-20
• [N019127], Technical Note, William Joseph Hammer, July 21st, 1880
  1880-07-21
• [N019133], Technical Note, William Joseph Hammer, July 22nd, 1880
  1880-07-22
• [N019137], Technical Note, William Joseph Hammer, July 23rd, 1880
  1880-07-23
• [N019147], Technical Note, William Joseph Hammer, July 24th, 1880
  1880-07-24
• [N120010] Technical Note, c. 1880
  1880-00-00
• [N120027] Technical Note, c. 1880
  1880-00-00
• [N120256], Technical Note, William Joseph Hammer, December 7th, 1880
  1880-12-07
• [N120268], Technical Note, William Joseph Hammer, December 4th, 1880
  1880-12-04
• [N120272], Technical Note, William Joseph Hammer, November 25th, 1880
  1880-11-25
• [N123003], Technical Note, William Joseph Hammer, August 17th, 1880
  1880-08-17
• [N123024] Technical Note, August 1880
  1880-08-00
• [N129033] Technical Note, August 1880
  1880-08-00
• [N129205] Technical Note, October 1880
  1880-10-00
• [N137082] Technical Note, August 1880
  1880-08-00
• [N137084A], Technical Note, William Joseph Hammer, August 23rd, 1880
  1880-08-23
• [N137095], Technical Note, William Joseph Hammer, August 26th, 1880
  1880-08-26
• [N137124A], Technical Note, William Joseph Hammer, October 14th, 1880
  1880-10-14