[68]. Portable “loco-type” multitubular.
[69]. Fixed return-tube.
![[Larger plate.]](#3701448400155979539_plate4lg.png.id-747808473276625832.wrap-0.html.html){kind=link}
[70]. Fixed “loco-type” multitubular; a favorite and useful form, giving good results, and easily cleaned.
[71]. Fixed “loco-type,” with underneath fire-box; sometimes used to economise space, is self-contained, and usually stands on cast-iron feet.
[72]. Multitubular-horizontal; self contained; on cast-iron feet.
[73]. Egg-end boiler; not much used except where the coal burnt per h.p. per hour is not an important consideration.
[74]. “Cornish”; one flue, with enlarged fire-box tube. This type is often made with a parallel flue with cross tubes fixed at intervals throughout its length.
[75]. “Lancashire”; two flues; sometimes has enlarged fire-box tubes, as [No. 74].