Awyriad anneddau (Ventilation of dwellings)
Subtitle: neu eglurâd darluniadol o'r berthynas rhwng anadlu awyr pur a mwynâu iechyd. Ail argraffiad
Publisher: W. Spurrell, etc., etc.
Published: 1850
Place of publication: Caerfyrddin
Language: und
Notes: At head of title: Dan nawdd y Gwir Barchedig Connop Thirlwall, Arglwydd Esgob Ty Ddewi.

Imprint on cover has date 1852.