If the surface of a piece of Carrara marble be equal to one decimetre, the time of action one minute, and one cubic decimetre or litre contains one gram of hydrochloric acid, then about 0ยท02 gram of carbonic anhydride will be evolved.
But when the two latter salts were taken, then about 19 per cent.
Then about four o'clock in the short winter twilight we passed two or three regiments of French colonial troops on the march with all their field equipment.
Then about noon my friend came back in his camion to take up his cases of shells and report my wounded safe at the railway station.
Then about noon it stopped as suddenly as it had started.
Blanche, then about fourteen or fifteen years old, went to Valladolid to meet her husband.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "then about" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.