The Little Book of Irish Science SFI Little Book of Irish Science | Page 38

33 1844
Francis Rynd invented
the hollow needle of the
hypodermic syringe,
delivering the world’s fi rst
ever pain-relieving injection.
34 1857
Off aly born John Joly gave us
the photometer, meldometer, a
diff erential steam calorimeter,
colour printing on glas s, an
explanation for sap rising in tall
trees and most signifi cantly the fi rst
eff ective radiotherapy for treating
cancer, the ‘Dublin Method’.