Hi Jake,
The online IGI can be found at:
http://www.familysearch.org/Eng/Search/ ... _form=true
Its limitations are as follows:
(1) Data submitted by LDS member is included. This inormation may be good or may be bad. Often there is no means of verifying it. Treat it with care. Look at the foot of any result page and see if the record you are looking at is a submission or is extracted from the records.
(2) There is a significant number of parishes where only the female births are shown. The male births are completely omitted. This applies only to the online version of the IGI. The version seen in LDS Family History Centres or on microiche in some libraries includes both male and female birth entries.
(3) Pre 1855 records are far from complete. Significant numbers of births or baptisms were never recorded, or the records have not survived. This was most common for families who did not belong to the (Established) Church of Scotland - the keepers of the Parochial Registers (which became the Old Parochial Registers - OPRs). Also, the further back you get, the fewer records survive. This limitation applies equally to ScotlandsPeople and the LDS.
For pre-1855, ScotlandsPeople has only the OPRs. It does not contain the LDS submissions that appear on the IGI. In that sense, all of their records are there to be verified.
The James (1829) and Robert (1832) that I referred to earlier were the children of Joseph Cowan and Margaret Rattray (or Rattery as it is spelled on one of them).
These two births and both parish records of Joseph and Margaret's marriage can be found on ScotlandsPeople. Unfotunately there is no obvious sign of Robert (of about 1828) in the birth indexes.
A parent search on the IGI (put the father's and mother's names in the boxes at the top right, and British Isles as the region - leave everything else blank - then search) shows only five of the children that you have listed. I take it you have found the others in the censuses.
ROBERT COWAN - Birth: 10 JUN 1849 Beath, Fife
JANET COWAN - Birth: 16 MAR 1855 Dunfermline, Fife
JOHN COWAN - Birth: 26 MAR 1860 Beath, Fife
ANDREW COWAN - Birth: 30 SEP 1862 Beath, Fife
WILLIAM COWAN - Birth: 03 SEP 1865 Balingry, Fife
If you haven't already done so, the main recommendation is for you to download the 1855 birth certificate for Janet. 1855 certificates give more information than is given in any other year.
All the best,
AndrewP