Occasionally special provision is made for the infants. Thus, at York, milk and bread is given in the middle of the morning to infants who are on the feeding list, it having been found that they could not digest the ordinary dinners. But as a rule, though in well managed centres the infants are placed together at special tables, so that they can be better supervised and taught how to eat, there is no separate dietary for them. Where only breakfasts are provided there is, of course, less room for variation. Generally cocoa or coffee is given, with bread and butter, margarine, dripping, jam or syrup. At Bootle pea soup is given one day a week. In several towns porridge is provided, either alternately with the cocoa or coffee breakfast, or every day. At Sheffield, where a cocoa breakfast used to be given, porridge was substituted at one school as an experiment; it was found that the boys who were fed on porridge increased in weight at double the rate of the boys who received only the cocoa breakfast; as a result porridge breakfasts were substituted in all the schools.[247] Footnote 247: Report of Chief School Medical Officer for Sheffield, for the year 1910, pp. 26, 27. See post, p. 190. (iii) Preparation and Distribution of the Meals. In a few cases the Local Education Authority has equipped a kitchen for the preparation of the food, and makes arrangements for distributing it to the various centres. At Bradford all the meals, with the exception of those for schools in outlying districts where arrangements are made with local caterers, are cooked at a central kitchen and distributed in special heat-retaining boxes to the different dining centres by motor vans. Manchester, Birkenhead and other towns also have their own central kitchen. Sometimes, as at West Ham, a kitchen is attached to each of the centres; or occasionally a cookery centre is utilised for the preparation of the meals. Sometimes, as at Leeds and Portsmouth,[248] the Local Education Authority provides the kitchen and a caterer prepares the food. Frequently, however, all the arrangements for the preparation and the distribution of the meals are in the hands of caterers. Footnote 248: "The Importance of a Well-Advised and Comprehensive Scheme in the Selection of Children ... under the Education (Provision of Meals) Act," by Victor J. Blake, in _Rearing an Imperial Race_, edited by C. E. Hecht, 1913, p. 25. (iv) The Service of the Meals.