Boring hole plan for polar ammon gelignite B in pennant sandstone

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Douglas Simpson, Colliery Manager, PapersD624

Photographs and negativesD624/2

PapersD624/5

Plans, drawings, charts and diagramsD624/6

Colliery plansD624/6/1

Abercynon CollieryD624/6/1/1

Abernant CollieryD624/6/1/2

Cwmgorse CollieryD624/6/1/3

Lady Windsor CollieryD624/6/1/4

Llanharan CollieryD624/6/1/5

Section 51 panel no.7 seamD624/6/1/5/1

Boring hole plan for polar ammon gelignite B in pennant sandstoneD624/6/1/5/2

Base details hydro drill jibD624/6/1/5/3

Handwritten notes and drawings for boring 15 inch hole and transportable California switchD624/6/1/5/4

Order of boring, connecting and firing of shot holes in 14 foot arch heading Llanharan CollieryD624/6/1/5/5

Drawing of Bergtechnik GmbH Stoßschaufellader SDKD624/6/1/5/6

Hand drawn boring hole plansD624/6/1/5/7

Arching girder for 19 feet wide roadwayD624/6/1/5/8

Merthyr Vale CollieryD624/6/1/6

Nantgarw CollieryD624/6/1/7

Boring patternsD624/6/2

LocomotivesD624/6/3

Mine airwaysD624/6/4

Design of shaft liningsD624/6/5

Rand Leases rubber collarsD624/6/6

NotebooksD624/7

Handwritten notes and other papersD624/8

Social eventsD624/9

MagazinesD624/10

Catalogues and advertisementsD624/11

Information bookletsD624/12

Operating instructionsD624/13

CorrespondenceD624/14