| Arrangement of | Section | View on IMSLP | Composed | Type | Arranger | Instrumentation | 
| Morceaux de fantaisie, Op. 3 (Rachmaninoff, Sergei) | Mélodie (No.3) |  | 1892 | Fantasias | Julius Klengel | cello and piano | 
| 3 Sonatas for Viola da Gamba and Harpsichord, BWV 1027-1029 (Bach, Johann Sebastian) | Complete |  | 1730 | Sonatas | Julius Klengel | cello and piano | 
| 10 Woodland Sketches, Op. 51 (MacDowell, Edward) | Selections |  | 1895 | Sketches | Julius Klengel | cello and piano | 
| Cello Concerto, Op. 129 (Schumann, Robert) |  |  | 1850 | Concertos | Julius Klengel | cello and piano | 
| Cello Concerto No. 2 in D major, Hob.VIIb:2 (Haydn, Joseph) | Complete |  | 1783 | Concertos | Julius Klengel | cello and piano | 
| Cello Concerto No. 2 in D major, Hob.VIIb:2 (Haydn, Joseph) | Cadenzas |  | 1783 | Concertos | Pablo Casals and Julius Klengel |  | 
| Cello Concerto No. 2 in D major, Hob.VIIb:2 (Haydn, Joseph) | Cadenzas |  | 1783 | Concertos | Bernhard Cossmann and François-Auguste Gevaert and Karl Ripfel and David Popper and Anatoly Brandukov and Julius Klengel and Hugo Becker and Louis Abbiate and Alfred Moffat |  | 
| Souvenir de Hapsal, Op. 2 (Tchaikovsky, Pyotr) | Chant sans paroles (No.3) |  | 1867 | Pieces | Julius Klengel and Carl Reinecke | cello and piano | 
| Children's Album, Op. 39 (Tchaikovsky, Pyotr) | Nos.16, 18, 19, 21, 23 |  | 1878 | Pieces | Julius Klengel | cello and piano | 
| Romanze, WoO II/10 (Reger, Max) |  |  | 1902 | Romances | Julius Klengel | cello and piano | 
| Clarinet Quintet, Op. 115 (Brahms, Johannes) |  |  | 1891 | Quintets | Julius Klengel | clarinet and piano | 
| Cello Concerto No. 1, Op. 5 (Davydov, Karl) |  |  | 1859 | Concertos | Julius Klengel | cello and piano | 
| Minuet (Martini, Giovanni Battista) |  |  |  | Minuets | Willy Burmester and Julius Klengel | cello and piano | 
| Cello Concerto, Op. 33 (Volkmann, Robert) |  |  |  | Concertos | Julius Klengel | cello and piano | 
| Elegy, Op. 10 (Ernst, Heinrich Wilhelm) |  |  | 1829 | Elegies | Julius Klengel and Carl Reinecke | cello and piano | 
| Orchestral Suite No. 3 in D major, BWV 1068 (Bach, Johann Sebastian) | Selections |  | 1731 | Suites, Overtures | Julius Klengel and Carl Reinecke | cello and piano | 
| Orchestral Suite No. 3 in D major, BWV 1068 (Bach, Johann Sebastian) | Selections |  | 1731 | Suites, Overtures | Julius Klengel | cello and piano | 
| Unsere Lieblinge (Various) |  |  |  | Pieces | Julius Klengel | cello and piano | 
| Adagio, WoO 35 (Spohr, Louis) |  |  |  | Adagios | Julius Klengel | cello and piano | 
| Air in E-flat major (Bach, Johann Christian) |  |  |  | Airs | Julius Klengel and Carl Reinecke | cello and piano |