In previous work , Gardiner et al .
( [ 1999 ] ) found evidence for a discrepancy between the T _ { \mathrm { eff } } obtained from Balmer lines with that from photometry and fundamental values for A-type stars .
An investigation into this anomaly is presented using Balmer line profiles of stars in binary system with fundamental values of both T _ { \mathrm { eff } } and \log g .
A revision of the fundamental parameters for binary systems given by Smalley & Dworetsky ( [ 1995 ] ) is also presented .
The T _ { \mathrm { eff } } obtained by fitting H \alpha and H \beta line profiles is compared to the fundamental values and those obtained from uvby photometry .
We find that the discrepancy found by Gardiner et al .
( [ 1999 ] ) for stars in the range 7000 K \la \mbox { $T _ { \mathrm { eff } } $ } \la 9000 K is no longer evident .